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prelims, contents pages
Polyhedron 28, issue 14, 23 September 2009
Contents lists available at ScienceDirect
Polyhedron journal homepage: www.elsevier.com/locate/poly
Contents Papers Aminou Mohamadou, Gerard A. van Albada, Ilpo Mutikainen, Urho Turpeinen, Jérôme Marrot and Jan Reedijk Polyhedron 28 (2009) 2813
The tetradentate ligand N,N0 -bis(2-pyridylmethyl)-1,3-propanediamine can fold around transition-metal ions in 2 ways, generating either 2 cis octahedral positions for anion ligands, or 1 or 2 axial positions in square pyramidal or octahedral geometries.
Synthesis, crystal structure, hydrogen bonding and spectroscopy of transition-metal complexes with the ligand (N,N0 -bis(2-pyridylmethyl)-1,3propanediamine)
B. Machura, J. Mrozin´ski, R. Kruszynski and J. Kusz Polyhedron 28 (2009) 2821
Coordination chemistry of di-2-pyridylketone. Synthesis, spectroscopic investigations, X-ray studies and DFT calculations of Re(III) and Re(V) complexes The paper presents a combined experimental and computational study of Re(III) and Re(V) complexes containing di-2-pyridylketone and its gem-diol form – [ReCl3(dpk-N,O)(PPh3)] (1),
Akinbulu Isaac Adebayo and Tebello Nyokong Polyhedron 28 (2009) 2831
Synthesis, spectroscopic and electrochemical properties of manganese, nickel and iron octakis-(2-diethylaminoethanethiol)-phthalocyanine
[ReCl3(dpk-N,N0 )(OPPh3)] (2) and [ReOBr3(dpkOH)]Æ2(dpkH+Br)) (3). All the complexes have been characterized spectroscopically and structurally (by single-crystal X-ray diffraction). The complex 2 has been additionally studied by magnetic measurement. The magnetic behavior is characteristic of mononuclear octahedral Re(III) complex with d4 low-spin (3T1g ground state) and arise because of the large spin–orbit coupling (f = 2500 cm)1), which gives diamagnetic ground state. DFT and time-dependent (TD)DFT calculations have been carried out for [ReCl3(dpk-N,N0 )(OPPh3)] and [ReOBr3(dpkOH), and their UV–vis spectra have been discussed on this basis.
Manganese (3), nickel (4) and iron (5) phthalocyanine complexes, octa-substituted at the peripheral positions with diethlyaminoethanethiol substituents show that the central metal plans a significant role in the aggregation behavior, with Mn phthalocyanine derivatives showing the presence of l oxo dimers.
N
N
S
S
N N
N
S S
N
N
S
N
M
N
N
N
N
N
N S
S
N N
Elsevier Ltd.
S
iv
Tameryn Stringer, Prinessa Chellan, Bruno Therrien, Nelusha Shunmoogam-Gounden, Denver T. Hendricks and Gregory S. Smith Polyhedron 28 (2009) 2839
Contents
Binuclear palladium(II) salicylaldiminato dithiosemicarbazone complexes have been synthesized and characterized by NMR and IR spectroscopies, ESI-mass spectrometry, elemental analyses. Two representative complexes were determined by X-ray diffraction.
Synthesis and structural characterization of binuclear palladium(II) complexes of salicylaldimine dithiosemicarbazones
Polyhedron 28 (2009) 2847
Synthesis of Ni(II), Pd(II) and Cu(II) metal complexes of novel highly functionalized aroylaminocarbo-N-thioyl pyrrolidines and their activity against fungi and yeast
Ali Erdog˘mus¸ and Tebello Nyokong Polyhedron 28 (2009) 2855
New soluble methylendioxy-phenoxy-substituted zinc phthalocyanine derivatives: Synthesis, photophysical and photochemical studies
A series of Ni(II), Pd(II) and Cu(II) metal complexes of highly functionalized aroylaminocarbo-N-thioyl pyrrolidines were prepared and characterized by microanalysis, spectroscopic methods, magnetic susceptibility measurements and single crystal X-ray diffraction studies. The antifungal activity of the metal complexes against the yeast Saccharomyces cerevisae and against the fungus Penicillium digitatum was studied.
Photophysical and photochemical studies of the peripherally tetrakis- (4) and octakis- (6) and non-peripherally (5) tetrakis-3,4-(methylendioxy)-phenoxy-substituted zinc phthalocyanines show complex 4 to have higher singlet oxygen quantum yields, fluorescence quantum yields, triplet quantum yields and triplet life times than complexes 5 and 6.
R' R MeO2C
MeO2C H H
H H CO2Me
H R'' S
H R'' S
N
M
N
N
R' R CO2Me
N O
O
X
X
Complex 4 in DMSO 1.2
Normalized Intensity
Yahya Nural, Rafet Kilincarslan, H. Ali Dondas, Bekir Cetinkaya, Mehmet Sami Serin, Ronald Grigg, Tuncay Ince and Colin Kilner
1 0.8
(iii)
0.6 0.4
(ii)
0.2
(i) 0 600
620
640
660
680
700
720
Wavelength (nm)
_ ¸og˘lu, Hakan Dal, Tuncer Hökelek, Hanife Ibis _ Adem Kılıç, Ilker Ün and Sinan Varı Polyhedron 28 (2009) 2863
The reaction of thiophenoxide with aminosubstituted chloro-cyclotriphosphazenes
Six products were synthesised from the reaction of primary or secondary amino-substituted cyclotriphosphazenes with thiophenol. The structures of these compounds were characterised by elemental analysis and MS, 1H and 31 P NMR spectroscopies. Molecular and crystal structures of N3P3Cl4(NHPh)(SPh) (5) and N3P3Cl4(NC4H8)(SPh) (13) were investigated by X-ray crystallography.
740
760
780
800
Contents
Susanta Hazra, Samit Majumder, Michel Fleck, Rajesh Koner and Sasankasekhar Mohanta Polyhedron 28 (2009) 2871
Syntheses, structures, absorption and emission properties of a tetraiminodiphenol macrocyclic ligand and its dinuclear Zn(II) and Pb(II) complexes Synthesis of a Robson type macrocyclic ligand [H4L](ClO4)2 (1) obtained on condensation of 2,6-diformyl-4-methylphenol and 2,20 -dimethyl-1,3-diaminopropane, template synth-
Bikshandarkoil R. Srinivasan, Santosh Y. Shetgaonkar and Pallepogu Raghavaiah Polyhedron 28 (2009) 2879
v
esis of a dinuclear lead(II) complex [PbII2L(NO3)2] (2), synthesis of a dinuclear zinc(II) complex [ZnII2L(NO3)(H2O)](ClO4) (3) through metal substitution reaction and synthesis of another dinuclear zinc(II) complex [ZnII2L(H2O)2](ClO4)2.(H2O)2 (4) obtained directly from 1 are described in the present study. Crystal structures of 1 and 3 have been determined. Spectrophotometric and spectrofluorometric titrations of 1 with triethylamine as well as with zinc(II) acetate were studied also.
A pair of l2–g2:g1 carboxylate ligands bridge two symmetry related Ca(II) ions leading to the formation of a tricyclic dicalcium-bis(2-nitrobenzoate) unit which constitutes the building block of the coordination polymer.
A calcium(II) coordination polymer based on a tricyclic dicalcium-bis(2-nitrobenzoate) building block
Structural and magnetic properties of CoxZn1)xFe2O4 nanocrystals synthesized by microwave method Microwave assisted combustion method was used to produce nanocrystalline cobalt doped zinc ferrite, CoxZn1)xFe2O4, from stoichiometric mixture of (Co(NO3)2Æ6H2O), (Fe(NO3)3Æ9H2O), (Zn(NO3)2Æ6H2O), and urea (CO(NH2)2) as a fuel. The structural, morphological and magnetic properties of the products were determined by
ˇ ernák, Anna Pavlová, Juraj C ˇ aková and Alzˇbeta Orendácˇová, Marcela Kajn Juraj Kuchár Polyhedron 28 (2009) 2893
A novel two-dimensional Ni(II) fumarato complex: Solvothermal synthesis, crystal structure and magnetic properties
[Ni(fum)(phen)], prepared by the solvothermal method, exhibits a 2D crystal structure with bridging fumarato ligands. The presence of {Ni}2 pairs in the structure, forming antiferromagnetic S = 1 dimers with magnetic anisotropy D/kB = )6 K comparable to intra-dimer exchange coupling J, is reflected by magnetic measurements down to 2 K.
60
x= 0.8
40
x= 0.4
20 x=0.2 0 Magnetization (emu/g)
Polyhedron 28 (2009) 2887
X-ray powder diffractometry (XRD), Fourier transmission infrared spectroscopy (FTIR), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) respectively. The average crystallite sizes obtained from XRD were between 35 and 39 nm. Magnetization measurements indicate that samples with less Co content have superparamagnetic behavior at room temperature. When the Co substitution increases the saturation magnetization and coercivity also increase due to anisotropic nature of cobalt. The CoxZn1)xFe2O4 nanoparticles exhibit typical features of an assembly of magnetic particles with a distribution of blocking temperatures and indicate the spin-glass behavior.
Magnetization (emu/g)
Y. Köseog˘lu, A. Baykal, F. Gözüak and H. Kavas
-20 -40 -60
x=0.2
5
0
-5
-10000
-5000
0
5000
10000
Magnetic Field (Oe)
-10000
-5000
0 Magnetic Field (Oe)
5000
10000
vi
A. Bhattacharjee, M. Bałanda, Y. Miyazaki, M. Sorai and P. Gütlich Polyhedron 28 (2009) 2899
Uncompensated magnetization in the layered molecular antiferromagnet {N(n-C5H11)4[MnIIFeIII(ox)3]}¥ The honeycomb layered {N(n-C5H11)4[MnIIFeIII(ox)3]}¥ antiferromagnet, where both MnII and FeIII ions have spin S = 5/2, shows anisotropy and an uncompensated moment below TN of 27 K. The Mössbauer spectrum in the applied
ˇ ivadin D. Bugarcˇic´, Ana Vujacˇic´, Z Jürgen Schiller, Vesna Vasic´ and Marijana Petkovic´ Polyhedron 28 (2009) 2905
Matrix-assisted laser desorption and ionisation time-of-flight mass spectrometry of Pt(II) and Pd(II) complexes
Zolfaghar Rezvani, Mohammad Ali Ghanea, Kamellia Nejati and Sara Abodollahzadeh Baghaei Polyhedron 28 (2009) 2913
Syntheses and mesomorphic properties of new oxygen-bridged dicopper complex homologous derived from azo-containing salicylaldimine Schiff base ligands
Han-Dong Yin, Li-Yuan Wen, Ji-Chun Cui and Wen-Kuan Li Polyhedron 28 (2009) 2919
Synthesis, characterizations and crystal structures of new organoantimony(V) complexes with various isomers of fluoromethylbenzoate ligands Six new organoantimony(V) complexes containing various isomers of fluoromethylbenzoate ligands [RC6H3COO]2SbPh3 and [RC6H3COO]SbPh4 [R = 3-F-4-(CH3) (1, 4), 4-F-2-(CH3) (2, 5), 5-F-2-(CH3) (3, 6)] have been synthesized by the
Contents
magnetic field reveals the presence of two FeIIIA and FeIIIB spin sites with different responses towards the external magnetic field that is most probably responsible for the uncompensated magnetization. Breaking the local symmetry of the FeIII sites by the bulky N(n-C5H11)4 cations together with a small difference in g-factors for MnII and FeIII ions and a relatively large zerofield splitting for MnII may be a reason for the two non-equivalent sites within the iron sublattice.
In this manuscript, we present the characteristic pattern of the matrix-assisted laser desorption and ionisation time-of-flight (MALDITOF) mass spectra of Pt(II) and Pd(II) complexes. Experimental conditions (matrix, addition of trifluoro acetic acid and addition of inorganic salt) were varied in order to find the best suitable conditions for reliable analysis of MALDITOF mass spectra of selected Pt(II) and Pd(II) complexes.
Copper (II) complexes derived from 5-((4-nalkoxyphenyl)azo)-N-(3-hydroxypropyl) salicylaldimine homologous are reported. The mesogenic properties of these complexes were studied by differential scanning calorimetry (DSC) and polarizing microscope. None of the free ligands exhibit liquid crystalline behavior but all of the copper complexes show a smectic A mesophase.
reactions of triphenylantimony(V) dichloride or tetraphenylantimony(V) bromide with various isomers of fluoromethylbenzoate ligands in 1:2 or 1:1 stoichiometries. All the complexes have been characterized by elemental analysis, IR and NMR [1H, 13C and 19F] studies. The crystal structures of complexes 1, 3, 4, 5 and 6 have been determined by X-ray single crystal diffraction. The structure of complexes show that the five-coordinated antimony(V) atom adopts a distorted trigonal bipyramidal geometry. Furthermore, weak but significant intermolecular C–HÆÆÆO, C–HÆÆÆF hydrogen bonds, C–HÆÆÆPi stacking lead to aggregation and assembly of these complexes into 1D and 2D supramolecular frameworks.
Contents
Neil F. Curtis, Horst Puschmann and Ward T. Robinson Polyhedron 28 (2009) 2927
Synthesis and structures of (13-hydroxylamino5,7,7,13-tetramethyl-1,4,8,11-tetraazacyclotetradec-4-ene-j4)nickel(II) tetrachlorozincate(II) and (13-azonium-5,5,7,13-tetramethyl-1,4, 8,11-tetraazacyclotetradecane-j4)nickel(II) tetrachlorozincate(II) chloride 2.25 water
Mehmet Kandaz and Atıf Koca Polyhedron 28 (2009) 2933
Synthesis, in situ spectroelectrochemical, in situ electrocolorimetric and electrocatalytic investigation of brown-manganese phthalocyanines aand b-substituted tetrakis{6-hydroxyhexylthiol)phthalocyaninato manganese (III) chloride complexes have been prepared via cyclotetramerization and characterized by elemental analysis, FTIR, MS and UV–Vis spectral data. The voltammetric and in situ spectroelectrochemical studies of the complexes reveal
Figen Arslan, Mustafa Odabas¸ og˘lu, Halis Ölmez and Orhan Büyükgüngör Polyhedron 28 (2009) 2943
Synthesis, crystal structure, spectral and thermal characterization of bis(o-vanillinato)triethylenglycoldiiminecopper(II) and bis[(R)())-hydroxymethylpropylimine o-vanillinato]copper(II)
B. Machura, M. Wolff, J. Kusz and R. Kruszynski Polyhedron 28 (2009) 2949
Reactivity of [ReOX3(PPh3)2] and [ReOX3(AsPh3)2] towards 2-(2-hydroxyphenyl)-1Hbenzimidazole: Synthesis, X-ray studies, spectroscopic characterization and DFT calculations for [ReOX2(hpb)(EPh3)] and [ReO(OMe)(hpb)2]Æ MeCN The paper presents a combined experimental and computational study of mono- and disubstituted Re(V) oxocomplexes obtained in the
Reduction by zinc/acid of the nitro function of (5,5,7,13-tetramethyl-13-nitro-1,4,8,11-tetraazacyclotetradec-4-ene)nickel(II) yields (13-hydroxylamino-5,7,7,13-tetramethyl-1,4,8,11-tetraazacyclotetradec-4-ene)nickel(II), isolated as the tetrachlorozincate salt, for which the structure was determined. Reduction by zinc/ acid of the nitro function of (5,5,7,13-tetramethyl-13-nitro-1,4,8,11-tetraazacyclotetradecane)nickel(II) yields (13-amino-5,5,7,13tetramethyl-1,4,8,11-tetraazacyclotetradecane) nickel(II), isolated as the tetrachlorozincate chloride salt of the protonated cation for which the structure was determined.
that both complexes exhibit an oxidation and three reduction processes having reversible, oneelectron, and diffusion controlled mass transfer characters, which are assigned to MnIIIPc2)/ MnIIPc2), MnIIPc2)/MnIPc2), MnIPc2)/MnIPc3) and MnIIIPc2)/MnIVPc2) couples respectively. Existence of oxygen in solution significantly affects the in situ spectroelectrochemical behaviors of the complexes due to the formation of l-oxo MnPc species. An in situ electrocolorimetric method has been applied to investigate the colors of the electro-generated anionic and cationic forms of the complexes for the first time in this study. The complexes coated on a glassy carbon electrode potentiostatically show considerably high electrocatalytic activity to the hydrogen evolution reaction in aqueous solution.
The novel complexes, bis(o-vanillinato)-triethyleneglycoldiiminecopper(II) (1) and bis[(R)())-hydroxymethylpropylimine o-vanillinato]copper(II) (2) were synthesized and characterized by elemental analysis, magnetic susceptibility, spectral methods (UV–Vis and FT-IR), simultaneous TG, DTA techniques and Xray diffraction. The crystal structures of (1) and (2) determined as: Cu atom is coordinated by two imine N atoms and two phenol O atoms from the Schiff base ligand in a slightly distorted square-planar coordination.
reactions of [ReOX3(EPh3)2] (X=Cl, Br; E=P, As) with 2-(2-hydroxyphenyl)-1H-benzimidazole (Hhpb). From the reactions of [ReOX3(PPh3)2] with Hhpb in molar ratio 1:1 cis and trans stereoisomers of [ReOX2(hpb)(PPh3)] were isolated, whereas the [ReOX3(AsPh3)2] oxocompounds react with Hhpb to give only cishalide isomers. The [ReOX2(hpb)(EPh3)] and [ReO(OMe)(hpb)2] MeCN complexes have been characterised spectroscopically and structurally (by single-crystal X-ray diffraction). The DFT and TDDFT calculations have been carried out for the trans-[ReOBr2(hpb)(PPh3)], cis-[ReOBr2(hpb)(AsPh3)] and [ReO(OMe)(hpb)2], and their UV-Vis spectra have been discussed on this basis.
vii
2+
Me N
Me
HN
NO2 NaBH 4 Me
Ni NH
HN
2+
Me
NH
Ni NH
HN Me
Me
NH
Zn / H+
2+
N
NH
H N OH
NH
Me
Ni HN Me
2+
Me HN HN Me
RS
N
Me
SR
RS
N M
N N
N
N M
N
N N
N
SR
N
N
SR
SR
RS 3
2 R=
NH
N
N
M= Mn
NH3+
Me
N N
NH Ni
Me
RS
Me
Me
Zn / H+ Me
NO2
OH
M= Mn
R=
OH
viii
Teresa F. Mastropietro, Donatella Armentano and Giovanni De Munno Polyhedron 28 (2009) 2965
Self-assembly of water cluster in iron(III) oxalate-bridged complexes The synthesis and crystal structural characterization of the compound of formula {[FeII(phen)3]2[Fe2IIIox5]}Æ11H2O (1) has been reported. The most interesting feature of the solid state structure of 1 is the formation of decan-
Olga A. Efremova, Yuri V. Mironov, Konstantin A. Brylev, Vladimir E. Fedorov, Hans-Jürgen Pietzsch and Holger Stephan Polyhedron 28 (2009) 2973
Isomerism in tetrahedral rhenium cluster complexes [Re4Q4(PMe2Ph)4X8]ÆnCH2Cl2 (Q = Se, X = Br; Q = Te, X = Cl, Br)
Thandeka Mthethwa, V.S.R. Rajasekhar Pullabhotla, Phumlani S. Mdluli, James Wesley-Smith and Neerish Revaprasadu Polyhedron 28 (2009) 2977
Synthesis of hexadecylamine capped CdS nanoparticles using heterocyclic cadmium dithiocarbamates as single source precursors
Di Sun, Geng-Geng Luo, Na Zhang, Jian-Hua Chen, Rong-Bin Huang, Li-Rong Lin and Lan-Sun Zheng Polyhedron 28 (2009) 2983
Influence of dicarboxylic acids on self-assembly process: Syntheses and structural characterization of new Ag(I) complexes derived from mixed ligands
Contents
uclear water clusters self-assembled by means of hydrogen bonding interactions between water molecules. The (H2O)10 clusters display extensive multiple interactions with the dimeric units, leading to the formation of an extended 3D supramolecular assembly, wherein hexameric water clusters interconnected with dodecameric hybrid water–Ooxalate clusters can be recognized. The comparison of this supramolecular architecture with that found in the already known compound of formula [Fe(bpm)3]2[Fe2(ox)5]Æ8H2O (2) allows some preliminary observations on the design and control of hydrate formation depending on the size and shape of templating cations.
Three new tetrahedral rhenium cluster compounds [Re4Q4(PMe2Ph)4X8]ÆnCH2Cl2 (X = Br, Q = Se (1), Te (2); X = Cl, Q = Te (3)) have been synthesized by reaction [Re4Q4(TeX2)4X8] (X = Br, Q = Se (for 1), Te (for 2); X = Cl, Q = Te (for 3)) with dimethylphenylphosphine in dichloromethane. All compounds have been characterized by single-crystal X-ray diffraction analysis. Different isomers were found to be crystallized out by layering of diethylether on CH2Cl2 solution.
Heterocyclic cadmium dithiocarbamates, [Cd(S2CNC5H10)2] and [Cd(S2CNC9H10)2] were synthesized. The complexes were thermolysed in hexadecylamine (HDA) to give HDA capped CdS nanoparticles. A combination of close to spherical, rod, bipods and tripods was obtained by varying the reaction parameters such as precursor concentration and temperature. The optical properties and X-ray diffraction studies of the particles are also reported.
Three new luminescent silver coordination polymers have been successfully synthesized by solution phase reaction of silver nitrate with different dicarboxylates and a cooperative heterocyclic 2-aminopyrimidine ligand under the ammoniacal condition. The structures of the three complexes which span from 2-D to 3-D networks, indicating that dicarboxylates play important roles in the formation of such coordination architectures.
Contents
4.0 3.5
-1 3
Polyhedron 28 (2009) 2989
Structural analysis and magnetic susceptibility measurements of a series of Ni(II)-Schiff base complexes reveal that the coordination geometry around Ni(II) and the magnetic interactions can be tuned by changing the bridging carboxylate group.
χMT / cm mol K
Pampa Mukherjee, Michael G.B. Drew, Vassilis Tangoulis, Marta Estrader, Carmen Diaz and Ashutosh Ghosh
ix
Facile strategies for the synthesis and crystallization of linear trinuclear nickel(II)-Schiff base complexes with carboxylate bridges: Tuning of coordination geometry and magnetic properties
3.0 2.5 2.0 1.5 1.0 0.5 0.0
0
50
100
150
T/K
Xin-Xin Xu, Xiao-Xia Liu, Xia Zhang and Ting Sun Polyhedron 28 (2009) 2997
In this article, we describe the synthesis of six new coordination polymers, among these complexes, complex 6 exhibits an interesting supramolecular network.
Mixed-ligand coordination polymers constructed from flexible 2,20 -biphenyldicarboxylate and rigid isomeric bipyridines
Masoud Salavati-Niasari, Mahnaz Dadkhah and Fatemeh Davar Polyhedron 28 (2009) 3005
Pure cubic ZrO2 nanoparticles by thermolysis of a new precursor
_ _ Okan Zafer Yes¸ ilel, Inci Ilker and Orhan Büyükgüngör Polyhedron 28 (2009) 3010
Three copper(II) complexes of thiophene-2,5dicarboxylic acid with dissimilar ligands: Synthesis, IR and UV–Vis spectra, thermal properties and structural characterizations
The present investigation reports on the synthesis and characterization of zirconium oxide (ZrO2) nanoparticles using thermolysis. Pure zirconium oxide (ZrO2) nanoparticles with diameters of 30–40 nm are fabricated from [bis(2-hydroxyacetophenato)oxozirconium(IV)], [Zr(HAP)3(H2O)2](NO3), as a precursor in the presence of oleylamine and triphenylphosphine as the solvent and capping agent.
We have synthesized and structurally characterized three 3D Cu(II) complexes which are derived from 2,5-thiophenedicarboxylate with dissimilar ligands. One of the complexes has a 1-D zigzag polymeric structure and tdc behaves as a bidentate ligand. In the other complexes, the tdc dianion acts as a counter ion. In all these complexes the Cu(II) atom has a distorted octahedral coordination geometry. Three-dimensional frameworks are constructed though hydrogen bonding and/or C–HÆÆÆp interactions in all the synthesized complexes.
200
250
300
x
Valeriu Mereacre, Denis Prodius, Constantin Turta, Sergiu Shova, George Filoti, Juan Bartolomé, Rodolphe Clérac, Christopher E. Anson and Annie K. Powell Polyhedron 28 (2009) 3017
The synthesis, structural characterization, magnetochemistry and Mössbauer spectroscopy of [Fe3LnO2(CCl3COO)8H2O(THF)3] (Ln = Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Lu and Y)
Vahid Amani, Nasser Safari, Hamid Reza Khavasi and Mehmet Akkurt Polyhedron 28 (2009) 3026
Synthesis, characterization and crystal structure determination of platinum(IV) complexes containing, bipyridine derivatives and chloride, [Pt(5,50 -dmbipy)Cl4] and [Pt(6-mbipy)Cl4]
Stephanie S. Peterson, Tishal Kirby, Mariappan Kadarkaraisamy, Richard M. Hartshorn and Andrew G. Sykes Polyhedron 28 (2009) 3031
Contents
The new tetranuclear complexes [Fe3Ln(3O)2(CCl3COO)8(H2O)(THF)3] (Ln = CeIII - LuIII) have been prepared. Magnetic susceptibility measurements show dominant intramolecular antiferromagnetic exchange interactions for all the complexes. At the time scale of the Mössbauer spectroscopy, evidence of magnetization blocking, i.e. slow relaxation of the magnetization, is observed below 3 K for TbIII derivative, which was confirmed by ac susceptibility measurements
[Pt(5,50 -dmbipy)Cl4] and [Pt(6-mbipy)Cl4] complexes, (5,50 -dmbipy is 5,50 -dimethyl-2,20 bipyridine and 6-mbipy is 6-methyl-2,20 -bipyridine) were prepared and characterized by elemental analysis, IR, UV–Vis, 1H NMR, 13C NMR and 195Pt NMR spectroscopies and X-ray diffraction.
Bis-substituted anthraquinone ligands containing nitrogen heterocycles form both chelating and bridging complexes with Ag(I) and Cu(I), as well as two new coordination polymers.
Chelating, bridging, and chain structures within Ag(I) and Cu(I) complexes of bis(nicotinyloxy), bis(isonicotinyloxy), and bis(pyrimidine-5-carboxyloxy)-1,8-disubstituted anthraquinone ligands
Kazuhiko Kandori, Kazuma Takeguchi, Masao Fukusumi and Yoshiaki Morisada Polyhedron 28 (2009) 3036
Preparation and characterization of calcium hydroxyapatite and balloon-like calcium phosphate particles from forced hydrolysis of Ca(OH)2–triphosphate solution
Tem pictures of spherical solid and ballon-type particles.
H2PtCl6.6H2O + [N-N]
CH3OH
[PtCl4(N-N)] + 2HCl
N-N is 5,5'-dimethyl-2,2'-bipyridine and 6-methyl-2,2'-bipyridine
Contents
Murugesan Velayudham and Seenivasan Rajagopal Polyhedron 28 (2009) 3043
Synthesis, characterization and photophysics of bimetallic manganese(I) and ruthenium(II) complexes
Juahir Yusnita, Subramaniam Puvaneswary, Hapipah Mohd. Ali, Ward T. Robinson and Thong Kwai-Lin Polyhedron 28 (2009) 3050
Synthesis, structural characterization and antibacterial activity of 2,6-diacetylpyridine bis(benzenesulfonohydrazide) Schiff bases and their copper(II) complexes
Isabel García-Santos, Jesús Sanmartín, Ana M. García-Deibe, Matilde Fondo and Esther Gómez Polyhedron 28 (2009) 3055
Structural and photophysical studies on a linear trinuclear zinc complex of 2-[(2-hydroxyethylimino)methyl]quinolin-8-ol
Yong-Min Lee, Bun-Joo Kim, Hee-Jin Kim, Sang-Yub Kim, Sung Kwon Kang and Sung-Nak Choi Polyhedron 28 (2009) 3060 Crystal structures and spectroscopic properties of copper(II) pseudohalide complexes with two sparteine epimers, having a CuN4 chromophore
A series of new manganese(I) monometallic and bimetallic complexes and manganese(I)–ruthenium(II) heterobimetallic complexes are synthesized and characterized. A weak interaction between two metal centers in Mn–Ru heterobimetallic complexes is observed. The Mn–Ru heterobimetallic complexes, show interesting photophysical properties.
X-ray crystallographic analysis on [CuL3Æ(py)]Æpy shows that the complex has a near square pyramidal, penta-coordinate geometry. The binegatively charged tetradentate Schiff base is asymmetrically coordinated to the Cu(II) ion via the pyridine N, the azomethine N, the sulfonyl O and the hydrazine N. A pyridine molecule is apically coordinated to the Cu(II) ion.
Single crystal X-ray diffraction studies on Zn3(HL)2(OAc)4 evidence that HL) is acting as an O,N-donor. A study of the luminescence properties in methanol solution showed that the quantum yield of Zn3(HL)2(OAc)4 is slightly higher than that of 8-hydroxyquinoline-2-carboxaldehyde.
Tetrahedrally distorted copper(II) sparteine pseudohalide complexes having the CuN4 chromophore were prepared and characterized by various spectroscopic techniques and X-ray crystallography. The results of X-ray crystallography and ESR spectroscopy are in a good agreement with the assumption that the degree of distortion from planar to tetrahedral will reduce the A|| value of four-coordinate copper(II) sparteine pseudohalide complexes.
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xii
A.D. Jana, R. Saha, A.K. Ghosh, S. Manna, J. Ribas, N. Ray Chaudhuri and G. Mostafa Polyhedron 28 (2009) 3065 Role of weak interactions in controlling the topology of coordination polymeric chains in [Pt(CN)4]2) bridged Cu(II) complexes: Syntheses, crystal structure and magnetic studies
V. Richterová, M. Alberti, J. Prˇíhoda, ˇ ák P. Kubácˇek, J. Taraba and Z. Z Polyhedron 28 (2009) 3078 New results in the ammonolysis of hexafluorocyclo-triphosphazene: Crystal structure of P3N3F5–NH–P3N3F4NH2
Hakan Erer, Okan Zafer Yes¸ ilel, Cihan Darcan and Orhan Büyükgüngör Polyhedron 28 (2009) 3087 Synthesis, spectroscopic, thermal Studies, antimicrobial activities and crystal structures of Co(II), Ni(II), Cu(II) and Zn(II)-orotate complexes with 2-methylimidazole Four M(II)-orotate complexes with 2-methylimidazole, mer-[Co(HOr)(H2O)2(2-meim)2] (1), (2), [Cu mer-[Ni(HOr)(H2O)2(2-meim)2] (HOr)(H2O)2(2-meim)] (3) and [Zn(HOr) (H2O)2(2-meim)] (4), (H3Or = orotic acid, 2meim = 2-methylimidazole) have been synthe-
Susobhan Biswas, Glenn P.A. Yap and Kamalendu Dey Polyhedron 28 (2009) 3094 Reaction of diacetylmonoxime with morpholine N-thiohydrazide in the absence and in presence of a metal ion: Facile synthesis of a thiadiazole derivative with non-bonded S S interaction The reaction of diacetylmonoxime with morpholine N-thiohydrazide under refluxing (16 h) conditions in ethanol afforded the zwitterionic nitrogen–sulfur heterocyclic compound N-(3,4dimethyl-1,2,5-thiadiazole-2-ium-2-yl)morpholine-4-carbothioate (dtmc), with a non-bon-
Contents
Four coordination polymers of [Pt(CN)4]2) bridged Cu(II) complexes reveal that zig-zag/ helical chains or (4,2) ribbons are the result of competition between hydrogen bonding and coordinative forces.
The reaction of hexafluoro-cyclo-triphosphazene P3N3F6 with ammonia in acetonitrile has been studied and new compounds, (2-imino-2,4,4,6,6-pentafluoro-2k5,4k5,6k5-cyclo-triphosphaza-1,3,5-trienyl)-2-amino-4,4,6,6-tetrafluoro-2k5,4k5,6k5-cyclo-triphosphaza-1,3,5-triene, P3N3F5–NH–P3N3F4NH2 (2), cis and trans isomers of non-gem-2,4-diamino-2,4,6,6-tetrafluoro-2k5,4k5,6k5-cyclo-triphosphaza-1,3,5-triene, P3N3F4(NH2)2 (4, 5), were identified in the reaction mixture. Two conformers of the compound 2, denoted as 2A and 2B, were isolated (conformational polymorphism).
sized and characterized. The complexes 1 and 2 have distorted octahedral geometries with two monodentate 2-methylimidazole ligands, chelated to the deprotonated nitrogen atom of pyrimidine ring and to the carboxylate oxygen atom of the orotate dianion and two aqua ligands. Complex 3 has distorted square pyramidal and 4 has distorted trigonal bipyramidal geometries with one 2-methylimidazole, bidentate orotate and an aqua ligands. The antimicrobial activities of 1 and 4 were found to be more active gram (+) than gram ()) and 4 could be use for treatment Sthapylococcus aureus.
ded S S interaction. This heterocyclic compound forms a 2D supramolecular sheet via C–H O and p p interactions. However, reaction of these two components in the presence of Zn(OAc)2Æ2H2O in ethanol yielded the zinc complex [Zn(Hdammthiol)(H2O)(OAc)]ÆH2O. A 1D supramolecular chain, diagonal to the ab plane, has been formed in this molecule, through O–HÆÆÆÆO hydrogen bonding. The zinc complex shows a blue emission in chloroform at room temperature.
Contents
Mehmet Kandaz, Orhan Güney and Filiz B. Senkal Polyhedron 28 (2009) 3110 Fluorescent chemosensor for Ag(I) based on amplified fluorescence quenching of a new phthalocyanine bearing derivative of benzofuran
N
O NH2 Cl N N O O
A new fluorescent chemosensor for Ag(I) as a family of peripherally functionalized zincphthalocyanine, 2(3),9(10),16(17),23(24)-tetrakis-{6-(-benzofuran-2-carboxylate)-hexylthio} phthalocyaninatozinc(II) has been synthesized. Both absorbance and fluorescence spectra of compound exhibit distinct changes in visible region in response to treatment with Ag(I) ion.
N M NH2
Cl O
M = Cu(II), Cd(II), Co(II)
S R
CH ,
R=
C O (CH2 )6 S
N
N
N
C (CH2 )6
S
N
Zn
N
S
O
O
C
N
N
N
O S (CH2 )6 O C O
D. Pérez, P. Sharma, A. Cabrera, N. Rosas, I. Arellano, A. Toscano and S. Hernández Polyhedron 28 (2009) 3115 Preparation of new 1,2-disubstituted ferrocenyl stibine derivatives containing ether/thioether pendant arm from a quaternary ferrocenyl ammonium salt
New 1,2-disubstituted ferrocenyl stibines viz. containing –CH2OR or –CH2SR pendant arm at the ortho-position have been synthesized and characterized by various physicochemical methods. These new ferrocenylstibines were
Kevin W. Cormier and Michael Lewis Polyhedron 28 (2009) 3120 Lithium and sodium cation binding of cyclopentadienyl anions: Electronic effects of cyclopentadienyl substitution
prepared by the nucleophilic substitution reaction of diphenyl[(N,N,N-trimethylaminomethyl ferrocenyl)iodide]stibine by different phenols and thiol viz. o-salicyldehyde, m-hydroxyacetaphenone, o-hydroxyaceto-phenone and furan-2-ylmethylthiol. Molecular structure of stibines (2), (3), (4) and (5) have been determined by X-ray crystallography. Molecular structure show that none of these heterobimetallic compound possess hypervalent interaction in the solid state. This type of interaction was found in similar compounds with CH2NR2 pendant arm.
Cp–Li and Cp–Na complexes involving substituted Cp rings were investigated using highlevel ab initio molecular orbital theory. The Cpmetal distances and binding energies correlate P very well with the Cp rm values. Furthermore, the metal charge correlates very well P with the Cp |rm| values.
CH
O
The syntheses as well as chemical and X-ray structural characterization of dichlorobis[1-(ptoluenesulfonyl)cytosine]copper(II) (2), its solvated pseudopolymorph containing two methanol molecules (3), dichlorobis[1-(ptoluenesulfonyl)cytosine]cadmium(II) (4), 1methanesulfonylcytosine (6) and its copper
S
O O
O
(CH2 )6 O
O
Transition metal complexes of N-1-tosylcytosine and N-1-mesylcytosine
R
O
Polyhedron 28 (2009) 3101
complex dichlorobis(1-methanesulfonylcytosine)copper(II) (7) are described. In addition, spectroscopic studies of dichlorobis[1-(p-toluenesulfonyl)cytosine]cobalt(II) (5), as well as of dichlorobis(1-mesylcytosine)cadmium(II) (8) are presented. The X-ray structure of complex 3 revealed charge delocalization inside the cytosine ring, prompted by copper coordination, as the first step towards tautomerization which has not been observed previously in the copper complexes of N-1 substituted cytosine.
O
Aleksandar Višnjevac, Nikola Biliškov and ˇ inic´ Biserka Z
xiii
xiv
Aliye Aslı Esenpınar and Mustafa Bulut Polyhedron 28 (2009) 3129 Synthesis and characterization of novel a- or btetra[6,7-dihexyloxy-3-(4-oxyphenyl)coumarin]-substituted metal-free and metallo phthalocyanines
The synthesis of novel phthalonitriles substituted at 3- or 4-position with 6,7-dihexyloxy3-(4-oxyphenyl)coumarin were performed. The metal-free and metallo phthalocyanines (MPcs) (M = Zn, Co, Cu) were prepared by cyclotetramerization of 6,7-dihexyloxy-3-[p-(20 ,30 -di-
Maria N. Nichick, Sergei V. Voitekhovich, Alexey Shavel, Anatoly I. Lesnikovich and Oleg A. Ivashkevich Polyhedron 28 (2009) 3138
Contents
cyanophenoxy)phenyl]coumarin or 6,7-di hexyloxy-3-[p-(30 ,40 -dicyanophenoxy)phenyl]coumarin. The newly prepared compounds, phthalonitriles and Pcs, have been characterized by elemental analysis, 1H NMR, 13C NMR, MALDI-TOF, IR, UV–Vis and fluorescence spectral data. The electronic spectra exhibit bands of coumarin identity along with characteristic Q and B bands of the Pc core. The IR-spectra of all Pcs showed three characteristic intense bands at 1709–1700 cm)1 for lactone carbonyl, two bands at 1489–1604 cm)1 for conjugated olefinic system.
Stable and nearly monodispersed Au nanoparticles were synthesized by reduction of tetrachloroaurate salts in a toluene-water system in the presence of 1-R-5-thiotetrazoles (R = Et, t-Bu, 1-adamatyl).
1-Substituted 5-thiotetrazoles as novel capping agents for stabilization of gold nanoparticles
J. Huub Adriaanse, Sven H.C. Askes, Yorrick van Bree, Stefan van Oudheusden, Eelke D. van den Bos, Esref Günay, Ilpo Mutikainen, Urho Turpeinen, Gerard A. van Albada, Jaap G. Haasnoot and Jan Reedijk
The coordination of the ligand 5,6,7-trimethyl[1,2,4]triazolo[1,5-a]pyrimidine towards transition-metal ions is strongly dependent on the counter ion.
Polyhedron 28 (2009) 3143 Coordination chemistry of 5,6,7-trimethyl[1,2,4]triazolo[1,5-a]pyrimidine with first-row transition-metal salts: Synthesis, spectroscopy and single-crystal structures, with counteranion dependence of the structures
Danuta Dobrzyn´ska, Tadeusz Lis, Joanna Woz´niak, Julia Jezierska, Marek Duczmal, Agnieszka Wojciechowska and Rafał Wysokin´ski Polyhedron 28 (2009) 3150 Crystal structure, spectroscopic, magnetic and theoretical studies of [bis(hippurato)bis(benzimidazole)copper(II)] propanol 1/4hydrate
[Cu(hipp)2(bim)2]ÆPrOHÆ0.25H2O (1) has been prepared in a one pot synthesis. The crystal structure of 1 consists of layers formed by molecules of the complex and solvent connected via hydrogen bonds. The unsymmetrical CuN2O2 core has been investigated by a spectroscopic (EPR and UV–Vis) magnetic study. DFT calculations have been performed.
Contents
Guang-Juan Xu, Ya-Hui Zhao, Kui-Zhan Shao, Guang-Sheng Yang, Ya-Qian Lan, Zhong-Min Su and Li-Kai Yan Polyhedron 28 (2009) 3155 Syntheses and characterizations of five coordination polymers constructed by 3,5-bis(pyridin-3-ylmethoxy)benzoic acid ligand
Pulak Chandra Mandal, Jhimli Bhattacharyya, Suranjana Das, Subrata Mukhopadhyay and Louis J. Kirschenbaum Polyhedron 28 (2009) 3162 Mechanistic studies on the oxidation of pyruvic acid by an oxo-bridged diiron(III,III) complex in aqueous acidic media
xv
Five coordination polymers, [Cd(L3)2]ÆH2O (1), [Zn(L3)2] (2), [Co(L3)2] (3), [Ni(L3)2] (4) and [Cu2(L3)2]Æ3H2O (5), where L3 = 3,5-bis(pyridin-3-ylmethoxy)benzoic acid, have been synthesized under hydrothermal conditions. 1 is a (3,4)-connected net with (63)(66) topology. 2–4 are isostructural and described by the (44 Æ 62) topology. The structure of 5 is a 2D binodal (6,3) net.
[Fe2(l-O)(phen)4(H2O)2]4+ (1) equilibrates with [Fe2(l-O)(phen)4(H2O)(OH)]3+ (2) and [Fe2(lO)(phen)4(OH)2]2+ (3) in aqueous solution (phen = 1,10-phenanthroline). In presence of excess phen, an aqueous solution of 1 oxidizes pyruvic acid to acetic acid and carbon dioxide; itself being reduced to two moles of [Fe(phen)3]2+. The reactive species are 1, 2 and the pyruvate anion (Py)). The reaction proceeds through a rate limiting 1e, 1H+ electroprotic mechanism.
4+
4+ N N
N Fe
O
N Fe
N
N N
+
Py-
1e, 1H+ slow
N N
N
H O
N
Fe
Fe
N H2O
OH2
+
N
N H2O
N N
OH2
fast 2+
Products, Fe , acetic acid, CO2 (N
N is 1,10-phenanthroline)
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Py
.
Contents lists available at ScienceDirect
Polyhedron journal homepage: www.elsevier.com/locate/poly
Contents Papers Aminou Mohamadou, Gerard A. van Albada, Ilpo Mutikainen, Urho Turpeinen, Jérôme Marrot and Jan Reedijk Polyhedron 28 (2009) 2813
The tetradentate ligand N,N0 -bis(2-pyridylmethyl)-1,3-propanediamine can fold around transition-metal ions in 2 ways, generating either 2 cis octahedral positions for anion ligands, or 1 or 2 axial positions in square pyramidal or octahedral geometries.
Synthesis, crystal structure, hydrogen bonding and spectroscopy of transition-metal complexes with the ligand (N,N0 -bis(2-pyridylmethyl)-1,3propanediamine)
B. Machura, J. Mrozin´ski, R. Kruszynski and J. Kusz Polyhedron 28 (2009) 2821
Coordination chemistry of di-2-pyridylketone. Synthesis, spectroscopic investigations, X-ray studies and DFT calculations of Re(III) and Re(V) complexes The paper presents a combined experimental and computational study of Re(III) and Re(V) complexes containing di-2-pyridylketone and its gem-diol form – [ReCl3(dpk-N,O)(PPh3)] (1),
Akinbulu Isaac Adebayo and Tebello Nyokong Polyhedron 28 (2009) 2831
Synthesis, spectroscopic and electrochemical properties of manganese, nickel and iron octakis-(2-diethylaminoethanethiol)-phthalocyanine
[ReCl3(dpk-N,N0 )(OPPh3)] (2) and [ReOBr3(dpkOH)]Æ2(dpkH+Br)) (3). All the complexes have been characterized spectroscopically and structurally (by single-crystal X-ray diffraction). The complex 2 has been additionally studied by magnetic measurement. The magnetic behavior is characteristic of mononuclear octahedral Re(III) complex with d4 low-spin (3T1g ground state) and arise because of the large spin–orbit coupling (f = 2500 cm)1), which gives diamagnetic ground state. DFT and time-dependent (TD)DFT calculations have been carried out for [ReCl3(dpk-N,N0 )(OPPh3)] and [ReOBr3(dpkOH), and their UV–vis spectra have been discussed on this basis.
Manganese (3), nickel (4) and iron (5) phthalocyanine complexes, octa-substituted at the peripheral positions with diethlyaminoethanethiol substituents show that the central metal plans a significant role in the aggregation behavior, with Mn phthalocyanine derivatives showing the presence of l oxo dimers.
N
N
S
S
N N
N
S S
N
N
S
N
M
N
N
N
N
N
N S
S
N N
Elsevier Ltd.
S
iv
Tameryn Stringer, Prinessa Chellan, Bruno Therrien, Nelusha Shunmoogam-Gounden, Denver T. Hendricks and Gregory S. Smith Polyhedron 28 (2009) 2839
Contents
Binuclear palladium(II) salicylaldiminato dithiosemicarbazone complexes have been synthesized and characterized by NMR and IR spectroscopies, ESI-mass spectrometry, elemental analyses. Two representative complexes were determined by X-ray diffraction.
Synthesis and structural characterization of binuclear palladium(II) complexes of salicylaldimine dithiosemicarbazones
Polyhedron 28 (2009) 2847
Synthesis of Ni(II), Pd(II) and Cu(II) metal complexes of novel highly functionalized aroylaminocarbo-N-thioyl pyrrolidines and their activity against fungi and yeast
Ali Erdog˘mus¸ and Tebello Nyokong Polyhedron 28 (2009) 2855
New soluble methylendioxy-phenoxy-substituted zinc phthalocyanine derivatives: Synthesis, photophysical and photochemical studies
A series of Ni(II), Pd(II) and Cu(II) metal complexes of highly functionalized aroylaminocarbo-N-thioyl pyrrolidines were prepared and characterized by microanalysis, spectroscopic methods, magnetic susceptibility measurements and single crystal X-ray diffraction studies. The antifungal activity of the metal complexes against the yeast Saccharomyces cerevisae and against the fungus Penicillium digitatum was studied.
Photophysical and photochemical studies of the peripherally tetrakis- (4) and octakis- (6) and non-peripherally (5) tetrakis-3,4-(methylendioxy)-phenoxy-substituted zinc phthalocyanines show complex 4 to have higher singlet oxygen quantum yields, fluorescence quantum yields, triplet quantum yields and triplet life times than complexes 5 and 6.
R' R MeO2C
MeO2C H H
H H CO2Me
H R'' S
H R'' S
N
M
N
N
R' R CO2Me
N O
O
X
X
Complex 4 in DMSO 1.2
Normalized Intensity
Yahya Nural, Rafet Kilincarslan, H. Ali Dondas, Bekir Cetinkaya, Mehmet Sami Serin, Ronald Grigg, Tuncay Ince and Colin Kilner
1 0.8
(iii)
0.6 0.4
(ii)
0.2
(i) 0 600
620
640
660
680
700
720
Wavelength (nm)
_ ¸og˘lu, Hakan Dal, Tuncer Hökelek, Hanife Ibis _ Adem Kılıç, Ilker Ün and Sinan Varı Polyhedron 28 (2009) 2863
The reaction of thiophenoxide with aminosubstituted chloro-cyclotriphosphazenes
Six products were synthesised from the reaction of primary or secondary amino-substituted cyclotriphosphazenes with thiophenol. The structures of these compounds were characterised by elemental analysis and MS, 1H and 31 P NMR spectroscopies. Molecular and crystal structures of N3P3Cl4(NHPh)(SPh) (5) and N3P3Cl4(NC4H8)(SPh) (13) were investigated by X-ray crystallography.
740
760
780
800
Contents
Susanta Hazra, Samit Majumder, Michel Fleck, Rajesh Koner and Sasankasekhar Mohanta Polyhedron 28 (2009) 2871
Syntheses, structures, absorption and emission properties of a tetraiminodiphenol macrocyclic ligand and its dinuclear Zn(II) and Pb(II) complexes Synthesis of a Robson type macrocyclic ligand [H4L](ClO4)2 (1) obtained on condensation of 2,6-diformyl-4-methylphenol and 2,20 -dimethyl-1,3-diaminopropane, template synth-
Bikshandarkoil R. Srinivasan, Santosh Y. Shetgaonkar and Pallepogu Raghavaiah Polyhedron 28 (2009) 2879
v
esis of a dinuclear lead(II) complex [PbII2L(NO3)2] (2), synthesis of a dinuclear zinc(II) complex [ZnII2L(NO3)(H2O)](ClO4) (3) through metal substitution reaction and synthesis of another dinuclear zinc(II) complex [ZnII2L(H2O)2](ClO4)2.(H2O)2 (4) obtained directly from 1 are described in the present study. Crystal structures of 1 and 3 have been determined. Spectrophotometric and spectrofluorometric titrations of 1 with triethylamine as well as with zinc(II) acetate were studied also.
A pair of l2–g2:g1 carboxylate ligands bridge two symmetry related Ca(II) ions leading to the formation of a tricyclic dicalcium-bis(2-nitrobenzoate) unit which constitutes the building block of the coordination polymer.
A calcium(II) coordination polymer based on a tricyclic dicalcium-bis(2-nitrobenzoate) building block
Structural and magnetic properties of CoxZn1)xFe2O4 nanocrystals synthesized by microwave method Microwave assisted combustion method was used to produce nanocrystalline cobalt doped zinc ferrite, CoxZn1)xFe2O4, from stoichiometric mixture of (Co(NO3)2Æ6H2O), (Fe(NO3)3Æ9H2O), (Zn(NO3)2Æ6H2O), and urea (CO(NH2)2) as a fuel. The structural, morphological and magnetic properties of the products were determined by
ˇ ernák, Anna Pavlová, Juraj C ˇ aková and Alzˇbeta Orendácˇová, Marcela Kajn Juraj Kuchár Polyhedron 28 (2009) 2893
A novel two-dimensional Ni(II) fumarato complex: Solvothermal synthesis, crystal structure and magnetic properties
[Ni(fum)(phen)], prepared by the solvothermal method, exhibits a 2D crystal structure with bridging fumarato ligands. The presence of {Ni}2 pairs in the structure, forming antiferromagnetic S = 1 dimers with magnetic anisotropy D/kB = )6 K comparable to intra-dimer exchange coupling J, is reflected by magnetic measurements down to 2 K.
60
x= 0.8
40
x= 0.4
20 x=0.2 0 Magnetization (emu/g)
Polyhedron 28 (2009) 2887
X-ray powder diffractometry (XRD), Fourier transmission infrared spectroscopy (FTIR), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) respectively. The average crystallite sizes obtained from XRD were between 35 and 39 nm. Magnetization measurements indicate that samples with less Co content have superparamagnetic behavior at room temperature. When the Co substitution increases the saturation magnetization and coercivity also increase due to anisotropic nature of cobalt. The CoxZn1)xFe2O4 nanoparticles exhibit typical features of an assembly of magnetic particles with a distribution of blocking temperatures and indicate the spin-glass behavior.
Magnetization (emu/g)
Y. Köseog˘lu, A. Baykal, F. Gözüak and H. Kavas
-20 -40 -60
x=0.2
5
0
-5
-10000
-5000
0
5000
10000
Magnetic Field (Oe)
-10000
-5000
0 Magnetic Field (Oe)
5000
10000
vi
A. Bhattacharjee, M. Bałanda, Y. Miyazaki, M. Sorai and P. Gütlich Polyhedron 28 (2009) 2899
Uncompensated magnetization in the layered molecular antiferromagnet {N(n-C5H11)4[MnIIFeIII(ox)3]}¥ The honeycomb layered {N(n-C5H11)4[MnIIFeIII(ox)3]}¥ antiferromagnet, where both MnII and FeIII ions have spin S = 5/2, shows anisotropy and an uncompensated moment below TN of 27 K. The Mössbauer spectrum in the applied
ˇ ivadin D. Bugarcˇic´, Ana Vujacˇic´, Z Jürgen Schiller, Vesna Vasic´ and Marijana Petkovic´ Polyhedron 28 (2009) 2905
Matrix-assisted laser desorption and ionisation time-of-flight mass spectrometry of Pt(II) and Pd(II) complexes
Zolfaghar Rezvani, Mohammad Ali Ghanea, Kamellia Nejati and Sara Abodollahzadeh Baghaei Polyhedron 28 (2009) 2913
Syntheses and mesomorphic properties of new oxygen-bridged dicopper complex homologous derived from azo-containing salicylaldimine Schiff base ligands
Han-Dong Yin, Li-Yuan Wen, Ji-Chun Cui and Wen-Kuan Li Polyhedron 28 (2009) 2919
Synthesis, characterizations and crystal structures of new organoantimony(V) complexes with various isomers of fluoromethylbenzoate ligands Six new organoantimony(V) complexes containing various isomers of fluoromethylbenzoate ligands [RC6H3COO]2SbPh3 and [RC6H3COO]SbPh4 [R = 3-F-4-(CH3) (1, 4), 4-F-2-(CH3) (2, 5), 5-F-2-(CH3) (3, 6)] have been synthesized by the
Contents
magnetic field reveals the presence of two FeIIIA and FeIIIB spin sites with different responses towards the external magnetic field that is most probably responsible for the uncompensated magnetization. Breaking the local symmetry of the FeIII sites by the bulky N(n-C5H11)4 cations together with a small difference in g-factors for MnII and FeIII ions and a relatively large zerofield splitting for MnII may be a reason for the two non-equivalent sites within the iron sublattice.
In this manuscript, we present the characteristic pattern of the matrix-assisted laser desorption and ionisation time-of-flight (MALDITOF) mass spectra of Pt(II) and Pd(II) complexes. Experimental conditions (matrix, addition of trifluoro acetic acid and addition of inorganic salt) were varied in order to find the best suitable conditions for reliable analysis of MALDITOF mass spectra of selected Pt(II) and Pd(II) complexes.
Copper (II) complexes derived from 5-((4-nalkoxyphenyl)azo)-N-(3-hydroxypropyl) salicylaldimine homologous are reported. The mesogenic properties of these complexes were studied by differential scanning calorimetry (DSC) and polarizing microscope. None of the free ligands exhibit liquid crystalline behavior but all of the copper complexes show a smectic A mesophase.
reactions of triphenylantimony(V) dichloride or tetraphenylantimony(V) bromide with various isomers of fluoromethylbenzoate ligands in 1:2 or 1:1 stoichiometries. All the complexes have been characterized by elemental analysis, IR and NMR [1H, 13C and 19F] studies. The crystal structures of complexes 1, 3, 4, 5 and 6 have been determined by X-ray single crystal diffraction. The structure of complexes show that the five-coordinated antimony(V) atom adopts a distorted trigonal bipyramidal geometry. Furthermore, weak but significant intermolecular C–HÆÆÆO, C–HÆÆÆF hydrogen bonds, C–HÆÆÆPi stacking lead to aggregation and assembly of these complexes into 1D and 2D supramolecular frameworks.
Contents
Neil F. Curtis, Horst Puschmann and Ward T. Robinson Polyhedron 28 (2009) 2927
Synthesis and structures of (13-hydroxylamino5,7,7,13-tetramethyl-1,4,8,11-tetraazacyclotetradec-4-ene-j4)nickel(II) tetrachlorozincate(II) and (13-azonium-5,5,7,13-tetramethyl-1,4, 8,11-tetraazacyclotetradecane-j4)nickel(II) tetrachlorozincate(II) chloride 2.25 water
Mehmet Kandaz and Atıf Koca Polyhedron 28 (2009) 2933
Synthesis, in situ spectroelectrochemical, in situ electrocolorimetric and electrocatalytic investigation of brown-manganese phthalocyanines aand b-substituted tetrakis{6-hydroxyhexylthiol)phthalocyaninato manganese (III) chloride complexes have been prepared via cyclotetramerization and characterized by elemental analysis, FTIR, MS and UV–Vis spectral data. The voltammetric and in situ spectroelectrochemical studies of the complexes reveal
Figen Arslan, Mustafa Odabas¸ og˘lu, Halis Ölmez and Orhan Büyükgüngör Polyhedron 28 (2009) 2943
Synthesis, crystal structure, spectral and thermal characterization of bis(o-vanillinato)triethylenglycoldiiminecopper(II) and bis[(R)())-hydroxymethylpropylimine o-vanillinato]copper(II)
B. Machura, M. Wolff, J. Kusz and R. Kruszynski Polyhedron 28 (2009) 2949
Reactivity of [ReOX3(PPh3)2] and [ReOX3(AsPh3)2] towards 2-(2-hydroxyphenyl)-1Hbenzimidazole: Synthesis, X-ray studies, spectroscopic characterization and DFT calculations for [ReOX2(hpb)(EPh3)] and [ReO(OMe)(hpb)2]Æ MeCN The paper presents a combined experimental and computational study of mono- and disubstituted Re(V) oxocomplexes obtained in the
Reduction by zinc/acid of the nitro function of (5,5,7,13-tetramethyl-13-nitro-1,4,8,11-tetraazacyclotetradec-4-ene)nickel(II) yields (13-hydroxylamino-5,7,7,13-tetramethyl-1,4,8,11-tetraazacyclotetradec-4-ene)nickel(II), isolated as the tetrachlorozincate salt, for which the structure was determined. Reduction by zinc/ acid of the nitro function of (5,5,7,13-tetramethyl-13-nitro-1,4,8,11-tetraazacyclotetradecane)nickel(II) yields (13-amino-5,5,7,13tetramethyl-1,4,8,11-tetraazacyclotetradecane) nickel(II), isolated as the tetrachlorozincate chloride salt of the protonated cation for which the structure was determined.
that both complexes exhibit an oxidation and three reduction processes having reversible, oneelectron, and diffusion controlled mass transfer characters, which are assigned to MnIIIPc2)/ MnIIPc2), MnIIPc2)/MnIPc2), MnIPc2)/MnIPc3) and MnIIIPc2)/MnIVPc2) couples respectively. Existence of oxygen in solution significantly affects the in situ spectroelectrochemical behaviors of the complexes due to the formation of l-oxo MnPc species. An in situ electrocolorimetric method has been applied to investigate the colors of the electro-generated anionic and cationic forms of the complexes for the first time in this study. The complexes coated on a glassy carbon electrode potentiostatically show considerably high electrocatalytic activity to the hydrogen evolution reaction in aqueous solution.
The novel complexes, bis(o-vanillinato)-triethyleneglycoldiiminecopper(II) (1) and bis[(R)())-hydroxymethylpropylimine o-vanillinato]copper(II) (2) were synthesized and characterized by elemental analysis, magnetic susceptibility, spectral methods (UV–Vis and FT-IR), simultaneous TG, DTA techniques and Xray diffraction. The crystal structures of (1) and (2) determined as: Cu atom is coordinated by two imine N atoms and two phenol O atoms from the Schiff base ligand in a slightly distorted square-planar coordination.
reactions of [ReOX3(EPh3)2] (X=Cl, Br; E=P, As) with 2-(2-hydroxyphenyl)-1H-benzimidazole (Hhpb). From the reactions of [ReOX3(PPh3)2] with Hhpb in molar ratio 1:1 cis and trans stereoisomers of [ReOX2(hpb)(PPh3)] were isolated, whereas the [ReOX3(AsPh3)2] oxocompounds react with Hhpb to give only cishalide isomers. The [ReOX2(hpb)(EPh3)] and [ReO(OMe)(hpb)2] MeCN complexes have been characterised spectroscopically and structurally (by single-crystal X-ray diffraction). The DFT and TDDFT calculations have been carried out for the trans-[ReOBr2(hpb)(PPh3)], cis-[ReOBr2(hpb)(AsPh3)] and [ReO(OMe)(hpb)2], and their UV-Vis spectra have been discussed on this basis.
vii
2+
Me N
Me
HN
NO2 NaBH 4 Me
Ni NH
HN
2+
Me
NH
Ni NH
HN Me
Me
NH
Zn / H+
2+
N
NH
H N OH
NH
Me
Ni HN Me
2+
Me HN HN Me
RS
N
Me
SR
RS
N M
N N
N
N M
N
N N
N
SR
N
N
SR
SR
RS 3
2 R=
NH
N
N
M= Mn
NH3+
Me
N N
NH Ni
Me
RS
Me
Me
Zn / H+ Me
NO2
OH
M= Mn
R=
OH
viii
Teresa F. Mastropietro, Donatella Armentano and Giovanni De Munno Polyhedron 28 (2009) 2965
Self-assembly of water cluster in iron(III) oxalate-bridged complexes The synthesis and crystal structural characterization of the compound of formula {[FeII(phen)3]2[Fe2IIIox5]}Æ11H2O (1) has been reported. The most interesting feature of the solid state structure of 1 is the formation of decan-
Olga A. Efremova, Yuri V. Mironov, Konstantin A. Brylev, Vladimir E. Fedorov, Hans-Jürgen Pietzsch and Holger Stephan Polyhedron 28 (2009) 2973
Isomerism in tetrahedral rhenium cluster complexes [Re4Q4(PMe2Ph)4X8]ÆnCH2Cl2 (Q = Se, X = Br; Q = Te, X = Cl, Br)
Thandeka Mthethwa, V.S.R. Rajasekhar Pullabhotla, Phumlani S. Mdluli, James Wesley-Smith and Neerish Revaprasadu Polyhedron 28 (2009) 2977
Synthesis of hexadecylamine capped CdS nanoparticles using heterocyclic cadmium dithiocarbamates as single source precursors
Di Sun, Geng-Geng Luo, Na Zhang, Jian-Hua Chen, Rong-Bin Huang, Li-Rong Lin and Lan-Sun Zheng Polyhedron 28 (2009) 2983
Influence of dicarboxylic acids on self-assembly process: Syntheses and structural characterization of new Ag(I) complexes derived from mixed ligands
Contents
uclear water clusters self-assembled by means of hydrogen bonding interactions between water molecules. The (H2O)10 clusters display extensive multiple interactions with the dimeric units, leading to the formation of an extended 3D supramolecular assembly, wherein hexameric water clusters interconnected with dodecameric hybrid water–Ooxalate clusters can be recognized. The comparison of this supramolecular architecture with that found in the already known compound of formula [Fe(bpm)3]2[Fe2(ox)5]Æ8H2O (2) allows some preliminary observations on the design and control of hydrate formation depending on the size and shape of templating cations.
Three new tetrahedral rhenium cluster compounds [Re4Q4(PMe2Ph)4X8]ÆnCH2Cl2 (X = Br, Q = Se (1), Te (2); X = Cl, Q = Te (3)) have been synthesized by reaction [Re4Q4(TeX2)4X8] (X = Br, Q = Se (for 1), Te (for 2); X = Cl, Q = Te (for 3)) with dimethylphenylphosphine in dichloromethane. All compounds have been characterized by single-crystal X-ray diffraction analysis. Different isomers were found to be crystallized out by layering of diethylether on CH2Cl2 solution.
Heterocyclic cadmium dithiocarbamates, [Cd(S2CNC5H10)2] and [Cd(S2CNC9H10)2] were synthesized. The complexes were thermolysed in hexadecylamine (HDA) to give HDA capped CdS nanoparticles. A combination of close to spherical, rod, bipods and tripods was obtained by varying the reaction parameters such as precursor concentration and temperature. The optical properties and X-ray diffraction studies of the particles are also reported.
Three new luminescent silver coordination polymers have been successfully synthesized by solution phase reaction of silver nitrate with different dicarboxylates and a cooperative heterocyclic 2-aminopyrimidine ligand under the ammoniacal condition. The structures of the three complexes which span from 2-D to 3-D networks, indicating that dicarboxylates play important roles in the formation of such coordination architectures.
Contents
4.0 3.5
-1 3
Polyhedron 28 (2009) 2989
Structural analysis and magnetic susceptibility measurements of a series of Ni(II)-Schiff base complexes reveal that the coordination geometry around Ni(II) and the magnetic interactions can be tuned by changing the bridging carboxylate group.
χMT / cm mol K
Pampa Mukherjee, Michael G.B. Drew, Vassilis Tangoulis, Marta Estrader, Carmen Diaz and Ashutosh Ghosh
ix
Facile strategies for the synthesis and crystallization of linear trinuclear nickel(II)-Schiff base complexes with carboxylate bridges: Tuning of coordination geometry and magnetic properties
3.0 2.5 2.0 1.5 1.0 0.5 0.0
0
50
100
150
T/K
Xin-Xin Xu, Xiao-Xia Liu, Xia Zhang and Ting Sun Polyhedron 28 (2009) 2997
In this article, we describe the synthesis of six new coordination polymers, among these complexes, complex 6 exhibits an interesting supramolecular network.
Mixed-ligand coordination polymers constructed from flexible 2,20 -biphenyldicarboxylate and rigid isomeric bipyridines
Masoud Salavati-Niasari, Mahnaz Dadkhah and Fatemeh Davar Polyhedron 28 (2009) 3005
Pure cubic ZrO2 nanoparticles by thermolysis of a new precursor
_ _ Okan Zafer Yes¸ ilel, Inci Ilker and Orhan Büyükgüngör Polyhedron 28 (2009) 3010
Three copper(II) complexes of thiophene-2,5dicarboxylic acid with dissimilar ligands: Synthesis, IR and UV–Vis spectra, thermal properties and structural characterizations
The present investigation reports on the synthesis and characterization of zirconium oxide (ZrO2) nanoparticles using thermolysis. Pure zirconium oxide (ZrO2) nanoparticles with diameters of 30–40 nm are fabricated from [bis(2-hydroxyacetophenato)oxozirconium(IV)], [Zr(HAP)3(H2O)2](NO3), as a precursor in the presence of oleylamine and triphenylphosphine as the solvent and capping agent.
We have synthesized and structurally characterized three 3D Cu(II) complexes which are derived from 2,5-thiophenedicarboxylate with dissimilar ligands. One of the complexes has a 1-D zigzag polymeric structure and tdc behaves as a bidentate ligand. In the other complexes, the tdc dianion acts as a counter ion. In all these complexes the Cu(II) atom has a distorted octahedral coordination geometry. Three-dimensional frameworks are constructed though hydrogen bonding and/or C–HÆÆÆp interactions in all the synthesized complexes.
200
250
300
x
Valeriu Mereacre, Denis Prodius, Constantin Turta, Sergiu Shova, George Filoti, Juan Bartolomé, Rodolphe Clérac, Christopher E. Anson and Annie K. Powell Polyhedron 28 (2009) 3017
The synthesis, structural characterization, magnetochemistry and Mössbauer spectroscopy of [Fe3LnO2(CCl3COO)8H2O(THF)3] (Ln = Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Lu and Y)
Vahid Amani, Nasser Safari, Hamid Reza Khavasi and Mehmet Akkurt Polyhedron 28 (2009) 3026
Synthesis, characterization and crystal structure determination of platinum(IV) complexes containing, bipyridine derivatives and chloride, [Pt(5,50 -dmbipy)Cl4] and [Pt(6-mbipy)Cl4]
Stephanie S. Peterson, Tishal Kirby, Mariappan Kadarkaraisamy, Richard M. Hartshorn and Andrew G. Sykes Polyhedron 28 (2009) 3031
Contents
The new tetranuclear complexes [Fe3Ln(3O)2(CCl3COO)8(H2O)(THF)3] (Ln = CeIII - LuIII) have been prepared. Magnetic susceptibility measurements show dominant intramolecular antiferromagnetic exchange interactions for all the complexes. At the time scale of the Mössbauer spectroscopy, evidence of magnetization blocking, i.e. slow relaxation of the magnetization, is observed below 3 K for TbIII derivative, which was confirmed by ac susceptibility measurements
[Pt(5,50 -dmbipy)Cl4] and [Pt(6-mbipy)Cl4] complexes, (5,50 -dmbipy is 5,50 -dimethyl-2,20 bipyridine and 6-mbipy is 6-methyl-2,20 -bipyridine) were prepared and characterized by elemental analysis, IR, UV–Vis, 1H NMR, 13C NMR and 195Pt NMR spectroscopies and X-ray diffraction.
Bis-substituted anthraquinone ligands containing nitrogen heterocycles form both chelating and bridging complexes with Ag(I) and Cu(I), as well as two new coordination polymers.
Chelating, bridging, and chain structures within Ag(I) and Cu(I) complexes of bis(nicotinyloxy), bis(isonicotinyloxy), and bis(pyrimidine-5-carboxyloxy)-1,8-disubstituted anthraquinone ligands
Kazuhiko Kandori, Kazuma Takeguchi, Masao Fukusumi and Yoshiaki Morisada Polyhedron 28 (2009) 3036
Preparation and characterization of calcium hydroxyapatite and balloon-like calcium phosphate particles from forced hydrolysis of Ca(OH)2–triphosphate solution
Tem pictures of spherical solid and ballon-type particles.
H2PtCl6.6H2O + [N-N]
CH3OH
[PtCl4(N-N)] + 2HCl
N-N is 5,5'-dimethyl-2,2'-bipyridine and 6-methyl-2,2'-bipyridine
Contents
Murugesan Velayudham and Seenivasan Rajagopal Polyhedron 28 (2009) 3043
Synthesis, characterization and photophysics of bimetallic manganese(I) and ruthenium(II) complexes
Juahir Yusnita, Subramaniam Puvaneswary, Hapipah Mohd. Ali, Ward T. Robinson and Thong Kwai-Lin Polyhedron 28 (2009) 3050
Synthesis, structural characterization and antibacterial activity of 2,6-diacetylpyridine bis(benzenesulfonohydrazide) Schiff bases and their copper(II) complexes
Isabel García-Santos, Jesús Sanmartín, Ana M. García-Deibe, Matilde Fondo and Esther Gómez Polyhedron 28 (2009) 3055
Structural and photophysical studies on a linear trinuclear zinc complex of 2-[(2-hydroxyethylimino)methyl]quinolin-8-ol
Yong-Min Lee, Bun-Joo Kim, Hee-Jin Kim, Sang-Yub Kim, Sung Kwon Kang and Sung-Nak Choi Polyhedron 28 (2009) 3060 Crystal structures and spectroscopic properties of copper(II) pseudohalide complexes with two sparteine epimers, having a CuN4 chromophore
A series of new manganese(I) monometallic and bimetallic complexes and manganese(I)–ruthenium(II) heterobimetallic complexes are synthesized and characterized. A weak interaction between two metal centers in Mn–Ru heterobimetallic complexes is observed. The Mn–Ru heterobimetallic complexes, show interesting photophysical properties.
X-ray crystallographic analysis on [CuL3Æ(py)]Æpy shows that the complex has a near square pyramidal, penta-coordinate geometry. The binegatively charged tetradentate Schiff base is asymmetrically coordinated to the Cu(II) ion via the pyridine N, the azomethine N, the sulfonyl O and the hydrazine N. A pyridine molecule is apically coordinated to the Cu(II) ion.
Single crystal X-ray diffraction studies on Zn3(HL)2(OAc)4 evidence that HL) is acting as an O,N-donor. A study of the luminescence properties in methanol solution showed that the quantum yield of Zn3(HL)2(OAc)4 is slightly higher than that of 8-hydroxyquinoline-2-carboxaldehyde.
Tetrahedrally distorted copper(II) sparteine pseudohalide complexes having the CuN4 chromophore were prepared and characterized by various spectroscopic techniques and X-ray crystallography. The results of X-ray crystallography and ESR spectroscopy are in a good agreement with the assumption that the degree of distortion from planar to tetrahedral will reduce the A|| value of four-coordinate copper(II) sparteine pseudohalide complexes.
xi
xii
A.D. Jana, R. Saha, A.K. Ghosh, S. Manna, J. Ribas, N. Ray Chaudhuri and G. Mostafa Polyhedron 28 (2009) 3065 Role of weak interactions in controlling the topology of coordination polymeric chains in [Pt(CN)4]2) bridged Cu(II) complexes: Syntheses, crystal structure and magnetic studies
V. Richterová, M. Alberti, J. Prˇíhoda, ˇ ák P. Kubácˇek, J. Taraba and Z. Z Polyhedron 28 (2009) 3078 New results in the ammonolysis of hexafluorocyclo-triphosphazene: Crystal structure of P3N3F5–NH–P3N3F4NH2
Hakan Erer, Okan Zafer Yes¸ ilel, Cihan Darcan and Orhan Büyükgüngör Polyhedron 28 (2009) 3087 Synthesis, spectroscopic, thermal Studies, antimicrobial activities and crystal structures of Co(II), Ni(II), Cu(II) and Zn(II)-orotate complexes with 2-methylimidazole Four M(II)-orotate complexes with 2-methylimidazole, mer-[Co(HOr)(H2O)2(2-meim)2] (1), (2), [Cu mer-[Ni(HOr)(H2O)2(2-meim)2] (HOr)(H2O)2(2-meim)] (3) and [Zn(HOr) (H2O)2(2-meim)] (4), (H3Or = orotic acid, 2meim = 2-methylimidazole) have been synthe-
Susobhan Biswas, Glenn P.A. Yap and Kamalendu Dey Polyhedron 28 (2009) 3094 Reaction of diacetylmonoxime with morpholine N-thiohydrazide in the absence and in presence of a metal ion: Facile synthesis of a thiadiazole derivative with non-bonded S S interaction The reaction of diacetylmonoxime with morpholine N-thiohydrazide under refluxing (16 h) conditions in ethanol afforded the zwitterionic nitrogen–sulfur heterocyclic compound N-(3,4dimethyl-1,2,5-thiadiazole-2-ium-2-yl)morpholine-4-carbothioate (dtmc), with a non-bon-
Contents
Four coordination polymers of [Pt(CN)4]2) bridged Cu(II) complexes reveal that zig-zag/ helical chains or (4,2) ribbons are the result of competition between hydrogen bonding and coordinative forces.
The reaction of hexafluoro-cyclo-triphosphazene P3N3F6 with ammonia in acetonitrile has been studied and new compounds, (2-imino-2,4,4,6,6-pentafluoro-2k5,4k5,6k5-cyclo-triphosphaza-1,3,5-trienyl)-2-amino-4,4,6,6-tetrafluoro-2k5,4k5,6k5-cyclo-triphosphaza-1,3,5-triene, P3N3F5–NH–P3N3F4NH2 (2), cis and trans isomers of non-gem-2,4-diamino-2,4,6,6-tetrafluoro-2k5,4k5,6k5-cyclo-triphosphaza-1,3,5-triene, P3N3F4(NH2)2 (4, 5), were identified in the reaction mixture. Two conformers of the compound 2, denoted as 2A and 2B, were isolated (conformational polymorphism).
sized and characterized. The complexes 1 and 2 have distorted octahedral geometries with two monodentate 2-methylimidazole ligands, chelated to the deprotonated nitrogen atom of pyrimidine ring and to the carboxylate oxygen atom of the orotate dianion and two aqua ligands. Complex 3 has distorted square pyramidal and 4 has distorted trigonal bipyramidal geometries with one 2-methylimidazole, bidentate orotate and an aqua ligands. The antimicrobial activities of 1 and 4 were found to be more active gram (+) than gram ()) and 4 could be use for treatment Sthapylococcus aureus.
ded S S interaction. This heterocyclic compound forms a 2D supramolecular sheet via C–H O and p p interactions. However, reaction of these two components in the presence of Zn(OAc)2Æ2H2O in ethanol yielded the zinc complex [Zn(Hdammthiol)(H2O)(OAc)]ÆH2O. A 1D supramolecular chain, diagonal to the ab plane, has been formed in this molecule, through O–HÆÆÆÆO hydrogen bonding. The zinc complex shows a blue emission in chloroform at room temperature.
Contents
Mehmet Kandaz, Orhan Güney and Filiz B. Senkal Polyhedron 28 (2009) 3110 Fluorescent chemosensor for Ag(I) based on amplified fluorescence quenching of a new phthalocyanine bearing derivative of benzofuran
N
O NH2 Cl N N O O
A new fluorescent chemosensor for Ag(I) as a family of peripherally functionalized zincphthalocyanine, 2(3),9(10),16(17),23(24)-tetrakis-{6-(-benzofuran-2-carboxylate)-hexylthio} phthalocyaninatozinc(II) has been synthesized. Both absorbance and fluorescence spectra of compound exhibit distinct changes in visible region in response to treatment with Ag(I) ion.
N M NH2
Cl O
M = Cu(II), Cd(II), Co(II)
S R
CH ,
R=
C O (CH2 )6 S
N
N
N
C (CH2 )6
S
N
Zn
N
S
O
O
C
N
N
N
O S (CH2 )6 O C O
D. Pérez, P. Sharma, A. Cabrera, N. Rosas, I. Arellano, A. Toscano and S. Hernández Polyhedron 28 (2009) 3115 Preparation of new 1,2-disubstituted ferrocenyl stibine derivatives containing ether/thioether pendant arm from a quaternary ferrocenyl ammonium salt
New 1,2-disubstituted ferrocenyl stibines viz. containing –CH2OR or –CH2SR pendant arm at the ortho-position have been synthesized and characterized by various physicochemical methods. These new ferrocenylstibines were
Kevin W. Cormier and Michael Lewis Polyhedron 28 (2009) 3120 Lithium and sodium cation binding of cyclopentadienyl anions: Electronic effects of cyclopentadienyl substitution
prepared by the nucleophilic substitution reaction of diphenyl[(N,N,N-trimethylaminomethyl ferrocenyl)iodide]stibine by different phenols and thiol viz. o-salicyldehyde, m-hydroxyacetaphenone, o-hydroxyaceto-phenone and furan-2-ylmethylthiol. Molecular structure of stibines (2), (3), (4) and (5) have been determined by X-ray crystallography. Molecular structure show that none of these heterobimetallic compound possess hypervalent interaction in the solid state. This type of interaction was found in similar compounds with CH2NR2 pendant arm.
Cp–Li and Cp–Na complexes involving substituted Cp rings were investigated using highlevel ab initio molecular orbital theory. The Cpmetal distances and binding energies correlate P very well with the Cp rm values. Furthermore, the metal charge correlates very well P with the Cp |rm| values.
CH
O
The syntheses as well as chemical and X-ray structural characterization of dichlorobis[1-(ptoluenesulfonyl)cytosine]copper(II) (2), its solvated pseudopolymorph containing two methanol molecules (3), dichlorobis[1-(ptoluenesulfonyl)cytosine]cadmium(II) (4), 1methanesulfonylcytosine (6) and its copper
S
O O
O
(CH2 )6 O
O
Transition metal complexes of N-1-tosylcytosine and N-1-mesylcytosine
R
O
Polyhedron 28 (2009) 3101
complex dichlorobis(1-methanesulfonylcytosine)copper(II) (7) are described. In addition, spectroscopic studies of dichlorobis[1-(p-toluenesulfonyl)cytosine]cobalt(II) (5), as well as of dichlorobis(1-mesylcytosine)cadmium(II) (8) are presented. The X-ray structure of complex 3 revealed charge delocalization inside the cytosine ring, prompted by copper coordination, as the first step towards tautomerization which has not been observed previously in the copper complexes of N-1 substituted cytosine.
O
Aleksandar Višnjevac, Nikola Biliškov and ˇ inic´ Biserka Z
xiii
xiv
Aliye Aslı Esenpınar and Mustafa Bulut Polyhedron 28 (2009) 3129 Synthesis and characterization of novel a- or btetra[6,7-dihexyloxy-3-(4-oxyphenyl)coumarin]-substituted metal-free and metallo phthalocyanines
The synthesis of novel phthalonitriles substituted at 3- or 4-position with 6,7-dihexyloxy3-(4-oxyphenyl)coumarin were performed. The metal-free and metallo phthalocyanines (MPcs) (M = Zn, Co, Cu) were prepared by cyclotetramerization of 6,7-dihexyloxy-3-[p-(20 ,30 -di-
Maria N. Nichick, Sergei V. Voitekhovich, Alexey Shavel, Anatoly I. Lesnikovich and Oleg A. Ivashkevich Polyhedron 28 (2009) 3138
Contents
cyanophenoxy)phenyl]coumarin or 6,7-di hexyloxy-3-[p-(30 ,40 -dicyanophenoxy)phenyl]coumarin. The newly prepared compounds, phthalonitriles and Pcs, have been characterized by elemental analysis, 1H NMR, 13C NMR, MALDI-TOF, IR, UV–Vis and fluorescence spectral data. The electronic spectra exhibit bands of coumarin identity along with characteristic Q and B bands of the Pc core. The IR-spectra of all Pcs showed three characteristic intense bands at 1709–1700 cm)1 for lactone carbonyl, two bands at 1489–1604 cm)1 for conjugated olefinic system.
Stable and nearly monodispersed Au nanoparticles were synthesized by reduction of tetrachloroaurate salts in a toluene-water system in the presence of 1-R-5-thiotetrazoles (R = Et, t-Bu, 1-adamatyl).
1-Substituted 5-thiotetrazoles as novel capping agents for stabilization of gold nanoparticles
J. Huub Adriaanse, Sven H.C. Askes, Yorrick van Bree, Stefan van Oudheusden, Eelke D. van den Bos, Esref Günay, Ilpo Mutikainen, Urho Turpeinen, Gerard A. van Albada, Jaap G. Haasnoot and Jan Reedijk
The coordination of the ligand 5,6,7-trimethyl[1,2,4]triazolo[1,5-a]pyrimidine towards transition-metal ions is strongly dependent on the counter ion.
Polyhedron 28 (2009) 3143 Coordination chemistry of 5,6,7-trimethyl[1,2,4]triazolo[1,5-a]pyrimidine with first-row transition-metal salts: Synthesis, spectroscopy and single-crystal structures, with counteranion dependence of the structures
Danuta Dobrzyn´ska, Tadeusz Lis, Joanna Woz´niak, Julia Jezierska, Marek Duczmal, Agnieszka Wojciechowska and Rafał Wysokin´ski Polyhedron 28 (2009) 3150 Crystal structure, spectroscopic, magnetic and theoretical studies of [bis(hippurato)bis(benzimidazole)copper(II)] propanol 1/4hydrate
[Cu(hipp)2(bim)2]ÆPrOHÆ0.25H2O (1) has been prepared in a one pot synthesis. The crystal structure of 1 consists of layers formed by molecules of the complex and solvent connected via hydrogen bonds. The unsymmetrical CuN2O2 core has been investigated by a spectroscopic (EPR and UV–Vis) magnetic study. DFT calculations have been performed.
Contents
Guang-Juan Xu, Ya-Hui Zhao, Kui-Zhan Shao, Guang-Sheng Yang, Ya-Qian Lan, Zhong-Min Su and Li-Kai Yan Polyhedron 28 (2009) 3155 Syntheses and characterizations of five coordination polymers constructed by 3,5-bis(pyridin-3-ylmethoxy)benzoic acid ligand
Pulak Chandra Mandal, Jhimli Bhattacharyya, Suranjana Das, Subrata Mukhopadhyay and Louis J. Kirschenbaum Polyhedron 28 (2009) 3162 Mechanistic studies on the oxidation of pyruvic acid by an oxo-bridged diiron(III,III) complex in aqueous acidic media
xv
Five coordination polymers, [Cd(L3)2]ÆH2O (1), [Zn(L3)2] (2), [Co(L3)2] (3), [Ni(L3)2] (4) and [Cu2(L3)2]Æ3H2O (5), where L3 = 3,5-bis(pyridin-3-ylmethoxy)benzoic acid, have been synthesized under hydrothermal conditions. 1 is a (3,4)-connected net with (63)(66) topology. 2–4 are isostructural and described by the (44 Æ 62) topology. The structure of 5 is a 2D binodal (6,3) net.
[Fe2(l-O)(phen)4(H2O)2]4+ (1) equilibrates with [Fe2(l-O)(phen)4(H2O)(OH)]3+ (2) and [Fe2(lO)(phen)4(OH)2]2+ (3) in aqueous solution (phen = 1,10-phenanthroline). In presence of excess phen, an aqueous solution of 1 oxidizes pyruvic acid to acetic acid and carbon dioxide; itself being reduced to two moles of [Fe(phen)3]2+. The reactive species are 1, 2 and the pyruvate anion (Py)). The reaction proceeds through a rate limiting 1e, 1H+ electroprotic mechanism.
4+
4+ N N
N Fe
O
N Fe
N
N N
+
Py-
1e, 1H+ slow
N N
N
H O
N
Fe
Fe
N H2O
OH2
+
N
N H2O
N N
OH2
fast 2+
Products, Fe , acetic acid, CO2 (N
N is 1,10-phenanthroline)
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Py
.