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prelims, contents pages
Polyhedron 30, issue 17, 3 November 2011
Contents lists available at SciVerse ScienceDirect
Polyhedron journal homepage: www.elsevier.com/locate/poly
Contents Research Articles Raj Pal Sharma, Ajnesh Singh, Paula Brandão, Vítor Félix and Paloth Venugopalan Polyhedron 30 (2011) 2759 Syntheses, characterization, thermal properties and single crystal structure determination of cobalt(III) complexes with 2,20 -biimidazole and 1,10-phenanthroline ligands
Ali Nemati Kharat, Abolghasem Bakhoda and Bahareh Tamaddoni Jahromi Polyhedron 30 (2011) 2768
Three novel cobalt(III) complexes, [Co[Co(phen)2(phen)2(Hbiim)][CdCl4]Æ2H2O, (Hbiim)][CdBr4]Æ1.5H2O and [Co(phen)2(Hbiim)][CdI4]ÆC3H6OÆ0.5H2O, have been synthesized and characterized. The packing analysis has revealed the presence of open channels in which solvent molecules of crystallization are residing in two complexes, while in third complex an ABCABC…type layered packing has been observed. Noncovalent interactions, like C–HÆÆÆX(Cl/Br/I), play a key role in the stabilization of the crystal lattices.
Green and chemoselective oxidation of alcohols with hydrogen peroxide: A 3 comparative study on Co(II) and Co(III) activity toward oxidation of alcohols.
Green and chemoselective oxidation of alcohols with hydrogen peroxide: A comparative study on Co(II) and Co(III) activity toward oxidation of alcohols
Elzet Stander-Grobler, Oliver Schuster, Christoph E. Strasser, Martin Albrecht, Stephanie Cronje and Helgard G. Raubenheimer Polyhedron 30 (2011) 2776 Normal and abnormal carbene complexes derived from thiazole: Preparation and a preliminary investigation of their relative catalytic performance
Elsevier Ltd.
The thiazolium character of their precursors is largely retained in the molecular structures of normal and two types of abnormal thiazolylidene complexes of Ni(II) and Pd(II). Suzuki–Miyaura coupling is less effectively catalysed by these complexes than by their pyridylidene analogues.
iv
Animesh Patra, Sandipan Sarkar, Titas Mukherjee, Ennio Zangrando and Pabitra Chattopadhyay Polyhedron 30 (2011) 2783 Zinc(II) complexes of 1,3-bis(2-pyridylmethylthio)propane: Anion dependency, crystal structure and DNA binding study
On reaction of 1,3-bis(2-pyridylmethylthio)propane (L) with different zinc(II) salts different types of zinc(II) complexes of the formula [Zn(L)(X)2] (where X = Cl), N3), NCO) and SCN) (1a–d, respectively)) and
Aliakbar Dehno Khalaji, Gholamhossein Grivani, Morteza Rezaei, Karla Fejfarova and Michal Dusek Polyhedron 30 (2011) 2790 Synthesis and spectral characterization of mercury(II) complexes with the bidentate Schiff base ligand N,N0 -bis(2,3-dimethoxybenzylidene)-1,2-diaminoethane: The crystal structures of [Hg((23-MeO-ba)2en)I2] and [Hg((23MeO-ba)2en)Br2]
Three mercury(II) complexes, [Hg((23MeO-ba)2en)X2] (X = I (1), Br (2) and
Richard Pastorek, Pavel Štarha, Tomáš Peterek and Zdeneˇk Trávnícˇek Polyhedron 30 (2011) 2795 Nickel(IV) dithiocarbamato complexes of the [Ni(ndtc)3]X type: X-ray structure of [Ni(hmidtc)3][FeCl4]
Saugata Konar, Atanu Jana, Kinsuk Das, Sangita Ray, Sudipta Chatterjee, James A. Golen, Arnold L. Rheingold and Susanta Kumar Kar Polyhedron 30 (2011) 2801 Synthesis, crystal structure, spectroscopic and photoluminescence studies of manganese(II), cobalt(II), cadmium(II), zinc(II) and copper(II) complexes with a pyrazole derived Schiff base ligand
Contents
{[Zn(L)(ClO4)(H2O)](ClO4)}n (2) were obtained and characterized by physicochemical and spectroscopic tools. The X-ray crystallographic analyses of the complexes showed that 1d is mononuclear while complex 2 is a 1D coordination polymer. The counter anion of the zinc(II) salt used as the reactant led to the formation of different types of complexes. The interaction of the polymeric complex 2 with calf thymus-DNA (CT-DNA) in Tris–HCl buffer has been studied spectroscopically.
Cl(3)), have been synthesized and characterized. The crystal and molecular structures of 1 and 2 were determined by X-ray crystallography from single-crystal data. The mercury(II) center in 1 and 2 has a distorted tetrahedral geometry with HgN2I2 and HgN2Br2 chromophores, respectively. The Schiff base ligand (23MeO-ba)2en acts as a chelating ligand, coordinating via the two nitrogen atoms to the mercury(II) center. The coordination sphere of the mercury(II) center in 1 and 2 is completed by the two I and Br atoms, respectively.
The distorted octahedral nickel(IV) complexes [Ni(ndtc)3]XÆyH2O (X = ClO4) for 1– 8; X = FeCl4) for 9–14; y = 0–1) were synthesized and characterized. The complex cations consist of three dithiocarbamate anions (ndtc) bidentate-coordinated to the central Ni(IV) atoms through both of their sulfur atoms, thus forming a highvalent NiIVS6 core, as demonstrated by a combination of a magnetic study of all the complexes and an X-ray crystallographic study of the complex [Ni(hmidtc)3][FeCl4)].
Varying coordination modes of a symmetrical pentadentate Schiff base ligand are reported with the synthesis, crystal structure, spectroscopic and photoluminescence studies of its Mn(II), Co(II), Cd(II), Zn(II) and Cu(II) complexes. Only the Zn(II) and Cd(II) complexes are fluorescence active among all the complexes, including the ligand.
S
S
N
N
Zinc acetate
SCN-
Mixture
ETOH / Reflux / 4 h
[Zn(L)(NCS)2] (1d)
L
Zinc perchlorate ETOH / Reflux / 2 h
{[Zn(L)(ClO4)(H2O)](ClO4)}n (2)
MeO
O CH3OH
MeO
+ H2N
NH2
MeO
N
N
OMe
OMe
MeO HgX2
MeO
N
N Hg
MeO X
OMe
OMe X
Contents
Mehdi Bayat, Fereshteh Yaghoobi, Sadegh Salehzadeh and Samaneh Hokmi Polyhedron 30 (2011) 2809 A theoretical study on the interaction of [Al(H2O)6]3+ and [Mg(H2O)6]2+ cations with fullerene (C60), coronene and benzene p-systems
B. Machura, A. S´witlicka, I. Nawrot, J. Mrozin´ski and K. Michalik Polyhedron 30 (2011) 2815 Cu(II), Cd(II) and Ni(II) azide complexes incorporating bis(3,5-dimethylpyrazol-1-yl)methane – Synthesis, spectroscopic characterisation, X-ray studies and magnetic properties
Three novel compounds [Cu2(l1,1-N3)2(N3)2(bdmpzm)2] (1) [Cd(N3)2(bdmpzm)]n (2) and [Ni(N3)2(bdmpzm)2] (3) have been synthesised and characterised structurally and spectroscopically. The structure 1 con-
Diana Visinescu, Bogdan Jurca, Adelina Ianculescu and Oana Carp Polyhedron 30 (2011) 2824 Starch – A suitable fuel in new low-temperature combustion-based synthesis of zinc aluminate oxides
Rafael Bou-Moreno, Simon A. Cotton, Verity Hunter, Kathryn Leonard, Andrew W.G. Platt, Paul R. Raithby and Stefanie Schiffers Polyhedron 30 (2011) 2832 Systematic structural studies on cobalt(II) complexes of tricyclohexylphosphine oxide and related ligands
Density functional theory (DFT), AIM and NBO calculations are used to understand the nature of the interaction between M(H2O)6n+ (M = Mg2+, Al3+) complexes with the p-systems of fullerene, coronene and benzene. The calculations suggest that the ionic potential of the central metal ion in the M(H2O)6n+ cation and the nature of p-system are two influential factors that affect the strength and the nature of the interaction.
sists of a neutral dinuclear [Cu2(l1,1-N3)2(N3)2(bdmpzm)2] entities, compound 2 has one-dimensional zigzag chain structure extending along the crystallographic direction [1 0 0] with alternating di-l1,1-N3 and di-l1,3-N3 bridges, and 3 is a mononuclear complex. The experimental studies on the nickel(II) complex have been accompanied computationally by the density functional theory (DFT) calculations.
Nanosized zinc aluminate spinelic oxides have been obtained following novel starchassisted combustion-based methods. Starch has been used as single low-temperature flame fuel (LTF) or in combination with a high-temperature flame fuel (HTF), N-methyl urea (NMU).
A series of 9 cobalt(II) phosphine oxide complexes, supported by halide, thiocyanate or nitrato groups have been prepared and structurally characterised. Trends in the molecular bond parameters have been analysed.
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Philip C. Andrews, William J. Gee, Peter C. Junk and Jonathan G. MacLellan Polyhedron 30 (2011) 2837 Synthesis and characterisation of a chiral lanthanoid cluster with an unusually exposed cubane core via concomitant deesterification of ethyl acetate
Batyr Garlyyev, Zehra Durmus, Nurufe Kemikli, Huseyin Sozeri, Abdulhadi Baykal and Ramazan Ozturk Polyhedron 30 (2011) 2843 Synthesis and magnetic properties of a porphine-based photosynthesizer with magnetic nano-carriers
P.M. Vimal Kumar and P.K. Radhakrishnan Polyhedron 30 (2011) 2849 Synthesis and structural characterization of Ni(II) complexes containing a heterocyclic NO donor ligand
Gregory L. Fondong, Edmond Y. Njua, Alexander Steiner, Charles F. Campana and Lothar Stahl Polyhedron 30 (2011) 2856 Syntheses and structures of zinc and tin(II) compounds with hemilabile N-silyl-tert-butylamido and N-silyl-p-tolylamido ligands that contain pendent tert-butoxy groups
Contents
Herein we report the synthesis of a holmium cubane cluster that exhibits a remarkably exposed central core. The cluster is ligated by seven chiral diketonate ligands that contain a protected carbohydrate group. Concomitant formation of an acetate co-ligand by deesterification of ethyl acetate yields interesting insights into the reactivity of lanthanoid cubane clusters towards simple ester species. The cluster has been characterised by MALDI mass spectrometry, elemental analysis and single crystal X-ray crystallography.
The synthesis and characterization of meso-tetra(4-carboxyphenyl)porphine (mTCPPD) coated SPION have been achieved successfully. Structural, surface, morphological, thermal and electrical properties of the nanocomposite were evaluated. TEM analysis of m-TCPPD coated SPION show an average particle size of 6.5 nm.
The present investigation reports the synthesis of a series of nickel(II) complexes [Ni(Opdac)2]Cl2 (1), [Ni(Opdac)2(CH3OH)2]Br2(CH3OH)2 (2), [Ni(Opdac)2]I2 (3), [Ni(Opdac)2NO3]NO3 (4) and [Ni(Opdac)2ClO4]ClO4 (5) with the Schiff base ligand, 4-(1-H-1,3-benzimidazole-2-yl)-1, 5-dimethyl-2-phenyl-1-2-dihydro-3-H-pyrazol-3-one (Opdac) and their characterization. In all the complexes, Opdac acts as neutral bidentate ligand forming six membered chelate ring around the central metal ion.
Hemilabile N,O amido-dimethylsilylalkoxy ligands create, depending on their mode of introduction, structurally-different metal complexes. Metatheses reactions of SnCl2 and ZnCl2 with the lithium salts of the amides gave mononuclear compounds with apparent spirocyclic structures. Aminolysis of ZnEt2, by contrast, furnished a tricyclic ladder structure, containing bridging amide ligands.
Contents
S. Salinas, M.A. Soto-Arriaza and B. Loeb Polyhedron 30 (2011) 2863 New iridium cyclometallated complexes with potential application in OLED
Adam Huczyn´ski, Jan Janczak and Bogumil Brzezinski Polyhedron 30 (2011) 2870 X-ray and FT-IR studies of structures of cyclic oxaalkyl diamide of o-phthalic acid and its complex with lead(II) perchlorate
Letitia L. Benade, Stephen O. Ojwach, Collins Obuah, Ilia A. Guzei and James Darkwa Polyhedron 30 (2011) 2878 Vinyl-addition polymerization of norbornene catalyzed by (pyrazol-1-ylmethyl)pyridine divalent iron, cobalt and nickel complexes
Robert A. Franich, Brian K. Nicholson, Hank W. Kroese, Suzanne S. Gallagher, Roger Meder, Joseph R. Lane and Brian D. Kelly Polyhedron 30 (2011) 2884 Synthesis, characterization and crystal structures of the boratranes: 2,10,11-trioxa-6-aza-1boratricyclo[4.4.4.01,6] tetradecane (tri-n-propanolamine borate), and 3-(4-methoxy)phenoxymethyl-7,10-dimethyl-2,8,9-trioxa-5-aza1-boratricyclo[3.3.3.01,5]-undecane
The photophysical properties of cyclometallated cationic iridium complexes that also contain substituted bipyridine ligands have been investigated in this work. The aliphatic chain on the substituent would avoid ordering in the solid state. The compounds show green-blue photoluminescence, showing in this way potentiality to be tested in OLED devices.
Cyclic oxaalkyl diamide of o-phthalic acid (CPhDA) and its complex with lead(II) perchlorate [CPhDA–Pb(ClO4)2–H2O (6:2:3)] in the crystalline form were obtained. The compounds were characterised by single crystal X-ray diffraction and by the FT-IR spectroscopy. The conformation of the CPhDA does not change significantly upon coordination of the Pb2+cation.
Activation of 2-(pyrazolylmethyl)pyridine and 2,6-bis(pyrazolylmethyl)pyridine nickel complexes with MAO produce active catalysts for the vinyl-addition polymerization of norbornene to give high molecular weight polymers. Analogous iron and cobalt complexes show lower catalytic activities under similar conditions.
The synthesis, spectroscopic properties and structures of two boratranes with five- or six-membered rings are reported. X-ray crystal structure results are compared with those of theoretical calculations, showing the importance of solvation/intermolecular contacts in controlling the length of the N fi B interaction.
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Mitsushiro Nomura, Noriko Sakamoto, Hirokazu Nakajima, Chikako FujitaTakayama, Toru Sugiyama and Masatsugu Kajitani Polyhedron 30 (2011) 2890 Syntheses and reactivities of azido coordinated CpCo(dithiolene) complexes
Azido coordinated dithiolene complexes [CpCo(N3){S2C2(CO2Me)2}(S-CHR1R2)], where R1, R2 = H (4a); R1 = H, R2 = SiMe3 (4b); R1 = H, R2 = CO2Et (4c), were synthesized. Among them, 4c was thermally (80 C) and
De-Zhi Hsaio, Jyh-Horung Chen, Shin-Shin Wang and Jo-Yu Tung Polyhedron 30 (2011) 2908 Structure and dynamic behavior of CF3CO2) in solution with a previously unknown g2 chelation mode to silver(I) in [Ag2(2-NCH2C6H5NCTPP)2]2+Æ[Ag2(O2CCF3)4]2)
Radosław Starosta, Aleksandra Bykowska, Maciej Barys, Anna K. Wieliczko, Zdzisław Staroniewicz and _ Małgorzata Jezowska-Bojczuk Polyhedron 30 (2011) 2914 Novel complexes of tris(aminomethyl)phosphanes with platinum(II): Structural, spectroscopic, DFT and biological activity studies
This work reports the X-ray crystal structure of one new diamagnetic silver inverted complex, 3-Ag(III,I). Dynamic 19F NMR spectra of the trifluoroacetato group in the anion of 3 (i.e., 3A) reveals that this group undergoes an intermolecular and isomerization exchange for the I(3A) … II(3A) process in CD2Cl2 solvent.
Structures and properties of two novel complexes: trans-[PtCl2{P(CH2N(CH2CH2)2Z)3}, where Z = O or NCH3 were determined spectroscopically and using X-ray crystallography and DFT methods. The biological activity and interactions with albumins and plasmid DNA of one of the complexes are presented.
R1
(
The reactions of N3P3Cl6 with mono and bis(4-fluorobenzyl) diamines produce tetrachloromono and bis(4-fluorobenzyl)monospirocyclophosphazenes. The mono-
R1
(
Phosphorus–nitrogen compounds part 22. Syntheses, structural investigations, biological activities and DNA interactions of new mono and bis (4-fluorobenzyl) spirocyclophosphazenes
chloro and fully substituted phosphazenes are obtained from the reactions of tetrachloro phosphazenes derivatives with excess pyrrolidine, morpholine and 1,4dioxa-8-azaspiro[4,5]decane (DASD). The structural investigations of the compounds have been verified by spectroscopy (MS, FTIR, 1H, 13C, 19F, 31P NMR, HSQC and HMBC) and X-ray diffraction techniques. DNA-binding and nature of interaction with pBR322 plasmid DNA are also studied and prevention of HindIII digestion with compounds indicates that the compounds bind with AT nucleotides in DNA.
(
Polyhedron 30 (2011) 2896
photochemically (UV) well reacted compared with the others to form the CR1R2bridged alkylidene adduct (2c; R1 = H, R2 = CO2Et), followed by a formal HN3 elimination. The electrochemical 1e) reduction of 4c underwent a formal N3) ligand elimination, and successive second reduction caused the CHR1R2 group elimination or reformed the CR1R2-bridged alkylidene adduct 2c.
(
Aytug˘ Okumus¸ , Zeynel Kılıç, Tuncer Hökelek, Hakan Dal, Leyla Açık, Yag˘mur Öner and L. Yasemin Koç
Contents
Cl
Cl
F
CH2
N
P N Cl Cl
N
P
P N
NR2
F
N
CH2
N
THF Cl
Cl
Cl
Cl
N
P
P N
NR2 P
P N Cl
R3
Cl
R3
N
P
R4
P
R3
N
O
R2=H or -CH2PhF
R3=
O
,N , N N R4=Cl or R3
O
Contents
Ngui Khiong Ngan, Kong Mun Lo and Chee Seng Richard Wong Polyhedron 30 (2011) 2922 Synthesis, structure studies and electrochemistry of molybdenum(VI) Schiff base complexes in the presence of different donor solvent molecules
Oxo-molybdenum chemistry is of great interest due to the presence of such units in the active sites of many enzymes, such as nitrogenase, aldehyde oxidase, xanthine oxidase, sulfite oxidase, nitrate reductase and xanthine dehydrogenate. Dioxomolyb-
Jan Janczak Polyhedron 30 (2011) 2933
denum complexes also play a pivotal role as catalysts in many important industrial processes, such as the oxidation of alcohols, olefin epoxidation and olefin metathesis. This work describes the synthesis, electrochemistry and structural features of a number of mononuclear dioxomolybdenum complexes containing dibasic tridentate Schiff base ligands. The synthesis and structures of dinuclear and polynuclear dioxomolybdenum complexes as well as the structure–catalytic activity relationship of these dioxomolybdenum complexes will be reported in subsequent research work.
dioxane does not change the colouring properties compared with the MgPc pigment.
4+1 and 4+2 coordinated complexes of magnesium phthalocyanine with dioxane
Two complexes of magnesium phthalocyanine with dioxane MgPc(dioxane)2 and ldioxane(MgPc)2 were obtained. The complexes co-crystallise in the centrosymmetric space group of the triclinic system. Due to the steric hindrance of the axial ligand, the crystals exhibit better solubility than the parent MgPc. Ligation of MgPc by
Nataliya P. Burkovskaya, Marina E. Nikiforova, Mikhail A. Kiskin, Anatoliy S. Lermontov, Artem S. Bogomyakov, Vladimir S. Mironov, Zhanna V. Dobrokhotova, Vasyl I. Pekhnyo, Aleksei A. Sidorov, Vladimir M. Novotortsev and Igor L. Eremenko Polyhedron 30 (2011) 2941 New dodecanuclear phenylphosphonatebridged Co(II) complexes
Abolghasem Bakhoda, Nasser Safari, Vahid Amani, Hamid Reza Khavasi and Mahin Gheidi Polyhedron 30 (2011) 2950 Dinuclear copper complexes of pyridylphenylphosphine ligands: Characterization of a mixedvalence CuII/CuI dimer
New dodecanuclear complexes [(l2-THF)5(g-HPiv)Co12(l3-OH)4(l6-O3PPh)4(l-Piv)12]Æ THFÆ2C6H6, [(l2-THF)6Co12(l3-OH)4(l6-O3PPh)4(l-Piv)12]Æ3THF and [(l2-Hmhp)6Co12(l3-OH)4(l6-O3PPh)4(l-Piv)12]Æ6.5 MeCN were synthesized. The magnetic properties and thermal decomposition of the dodecanuclear complexes were studied.
ix
x
Contents
Erratum Erratum to ‘‘Magnetization and EPR of a series of Cr3+ squarate dimers’’ [Polyhedron 29 (2010) 3021–3027] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2957
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Contents Research Articles Raj Pal Sharma, Ajnesh Singh, Paula Brandão, Vítor Félix and Paloth Venugopalan Polyhedron 30 (2011) 2759 Syntheses, characterization, thermal properties and single crystal structure determination of cobalt(III) complexes with 2,20 -biimidazole and 1,10-phenanthroline ligands
Ali Nemati Kharat, Abolghasem Bakhoda and Bahareh Tamaddoni Jahromi Polyhedron 30 (2011) 2768
Three novel cobalt(III) complexes, [Co[Co(phen)2(phen)2(Hbiim)][CdCl4]Æ2H2O, (Hbiim)][CdBr4]Æ1.5H2O and [Co(phen)2(Hbiim)][CdI4]ÆC3H6OÆ0.5H2O, have been synthesized and characterized. The packing analysis has revealed the presence of open channels in which solvent molecules of crystallization are residing in two complexes, while in third complex an ABCABC…type layered packing has been observed. Noncovalent interactions, like C–HÆÆÆX(Cl/Br/I), play a key role in the stabilization of the crystal lattices.
Green and chemoselective oxidation of alcohols with hydrogen peroxide: A 3 comparative study on Co(II) and Co(III) activity toward oxidation of alcohols.
Green and chemoselective oxidation of alcohols with hydrogen peroxide: A comparative study on Co(II) and Co(III) activity toward oxidation of alcohols
Elzet Stander-Grobler, Oliver Schuster, Christoph E. Strasser, Martin Albrecht, Stephanie Cronje and Helgard G. Raubenheimer Polyhedron 30 (2011) 2776 Normal and abnormal carbene complexes derived from thiazole: Preparation and a preliminary investigation of their relative catalytic performance
Elsevier Ltd.
The thiazolium character of their precursors is largely retained in the molecular structures of normal and two types of abnormal thiazolylidene complexes of Ni(II) and Pd(II). Suzuki–Miyaura coupling is less effectively catalysed by these complexes than by their pyridylidene analogues.
iv
Animesh Patra, Sandipan Sarkar, Titas Mukherjee, Ennio Zangrando and Pabitra Chattopadhyay Polyhedron 30 (2011) 2783 Zinc(II) complexes of 1,3-bis(2-pyridylmethylthio)propane: Anion dependency, crystal structure and DNA binding study
On reaction of 1,3-bis(2-pyridylmethylthio)propane (L) with different zinc(II) salts different types of zinc(II) complexes of the formula [Zn(L)(X)2] (where X = Cl), N3), NCO) and SCN) (1a–d, respectively)) and
Aliakbar Dehno Khalaji, Gholamhossein Grivani, Morteza Rezaei, Karla Fejfarova and Michal Dusek Polyhedron 30 (2011) 2790 Synthesis and spectral characterization of mercury(II) complexes with the bidentate Schiff base ligand N,N0 -bis(2,3-dimethoxybenzylidene)-1,2-diaminoethane: The crystal structures of [Hg((23-MeO-ba)2en)I2] and [Hg((23MeO-ba)2en)Br2]
Three mercury(II) complexes, [Hg((23MeO-ba)2en)X2] (X = I (1), Br (2) and
Richard Pastorek, Pavel Štarha, Tomáš Peterek and Zdeneˇk Trávnícˇek Polyhedron 30 (2011) 2795 Nickel(IV) dithiocarbamato complexes of the [Ni(ndtc)3]X type: X-ray structure of [Ni(hmidtc)3][FeCl4]
Saugata Konar, Atanu Jana, Kinsuk Das, Sangita Ray, Sudipta Chatterjee, James A. Golen, Arnold L. Rheingold and Susanta Kumar Kar Polyhedron 30 (2011) 2801 Synthesis, crystal structure, spectroscopic and photoluminescence studies of manganese(II), cobalt(II), cadmium(II), zinc(II) and copper(II) complexes with a pyrazole derived Schiff base ligand
Contents
{[Zn(L)(ClO4)(H2O)](ClO4)}n (2) were obtained and characterized by physicochemical and spectroscopic tools. The X-ray crystallographic analyses of the complexes showed that 1d is mononuclear while complex 2 is a 1D coordination polymer. The counter anion of the zinc(II) salt used as the reactant led to the formation of different types of complexes. The interaction of the polymeric complex 2 with calf thymus-DNA (CT-DNA) in Tris–HCl buffer has been studied spectroscopically.
Cl(3)), have been synthesized and characterized. The crystal and molecular structures of 1 and 2 were determined by X-ray crystallography from single-crystal data. The mercury(II) center in 1 and 2 has a distorted tetrahedral geometry with HgN2I2 and HgN2Br2 chromophores, respectively. The Schiff base ligand (23MeO-ba)2en acts as a chelating ligand, coordinating via the two nitrogen atoms to the mercury(II) center. The coordination sphere of the mercury(II) center in 1 and 2 is completed by the two I and Br atoms, respectively.
The distorted octahedral nickel(IV) complexes [Ni(ndtc)3]XÆyH2O (X = ClO4) for 1– 8; X = FeCl4) for 9–14; y = 0–1) were synthesized and characterized. The complex cations consist of three dithiocarbamate anions (ndtc) bidentate-coordinated to the central Ni(IV) atoms through both of their sulfur atoms, thus forming a highvalent NiIVS6 core, as demonstrated by a combination of a magnetic study of all the complexes and an X-ray crystallographic study of the complex [Ni(hmidtc)3][FeCl4)].
Varying coordination modes of a symmetrical pentadentate Schiff base ligand are reported with the synthesis, crystal structure, spectroscopic and photoluminescence studies of its Mn(II), Co(II), Cd(II), Zn(II) and Cu(II) complexes. Only the Zn(II) and Cd(II) complexes are fluorescence active among all the complexes, including the ligand.
S
S
N
N
Zinc acetate
SCN-
Mixture
ETOH / Reflux / 4 h
[Zn(L)(NCS)2] (1d)
L
Zinc perchlorate ETOH / Reflux / 2 h
{[Zn(L)(ClO4)(H2O)](ClO4)}n (2)
MeO
O CH3OH
MeO
+ H2N
NH2
MeO
N
N
OMe
OMe
MeO HgX2
MeO
N
N Hg
MeO X
OMe
OMe X
Contents
Mehdi Bayat, Fereshteh Yaghoobi, Sadegh Salehzadeh and Samaneh Hokmi Polyhedron 30 (2011) 2809 A theoretical study on the interaction of [Al(H2O)6]3+ and [Mg(H2O)6]2+ cations with fullerene (C60), coronene and benzene p-systems
B. Machura, A. S´witlicka, I. Nawrot, J. Mrozin´ski and K. Michalik Polyhedron 30 (2011) 2815 Cu(II), Cd(II) and Ni(II) azide complexes incorporating bis(3,5-dimethylpyrazol-1-yl)methane – Synthesis, spectroscopic characterisation, X-ray studies and magnetic properties
Three novel compounds [Cu2(l1,1-N3)2(N3)2(bdmpzm)2] (1) [Cd(N3)2(bdmpzm)]n (2) and [Ni(N3)2(bdmpzm)2] (3) have been synthesised and characterised structurally and spectroscopically. The structure 1 con-
Diana Visinescu, Bogdan Jurca, Adelina Ianculescu and Oana Carp Polyhedron 30 (2011) 2824 Starch – A suitable fuel in new low-temperature combustion-based synthesis of zinc aluminate oxides
Rafael Bou-Moreno, Simon A. Cotton, Verity Hunter, Kathryn Leonard, Andrew W.G. Platt, Paul R. Raithby and Stefanie Schiffers Polyhedron 30 (2011) 2832 Systematic structural studies on cobalt(II) complexes of tricyclohexylphosphine oxide and related ligands
Density functional theory (DFT), AIM and NBO calculations are used to understand the nature of the interaction between M(H2O)6n+ (M = Mg2+, Al3+) complexes with the p-systems of fullerene, coronene and benzene. The calculations suggest that the ionic potential of the central metal ion in the M(H2O)6n+ cation and the nature of p-system are two influential factors that affect the strength and the nature of the interaction.
sists of a neutral dinuclear [Cu2(l1,1-N3)2(N3)2(bdmpzm)2] entities, compound 2 has one-dimensional zigzag chain structure extending along the crystallographic direction [1 0 0] with alternating di-l1,1-N3 and di-l1,3-N3 bridges, and 3 is a mononuclear complex. The experimental studies on the nickel(II) complex have been accompanied computationally by the density functional theory (DFT) calculations.
Nanosized zinc aluminate spinelic oxides have been obtained following novel starchassisted combustion-based methods. Starch has been used as single low-temperature flame fuel (LTF) or in combination with a high-temperature flame fuel (HTF), N-methyl urea (NMU).
A series of 9 cobalt(II) phosphine oxide complexes, supported by halide, thiocyanate or nitrato groups have been prepared and structurally characterised. Trends in the molecular bond parameters have been analysed.
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Philip C. Andrews, William J. Gee, Peter C. Junk and Jonathan G. MacLellan Polyhedron 30 (2011) 2837 Synthesis and characterisation of a chiral lanthanoid cluster with an unusually exposed cubane core via concomitant deesterification of ethyl acetate
Batyr Garlyyev, Zehra Durmus, Nurufe Kemikli, Huseyin Sozeri, Abdulhadi Baykal and Ramazan Ozturk Polyhedron 30 (2011) 2843 Synthesis and magnetic properties of a porphine-based photosynthesizer with magnetic nano-carriers
P.M. Vimal Kumar and P.K. Radhakrishnan Polyhedron 30 (2011) 2849 Synthesis and structural characterization of Ni(II) complexes containing a heterocyclic NO donor ligand
Gregory L. Fondong, Edmond Y. Njua, Alexander Steiner, Charles F. Campana and Lothar Stahl Polyhedron 30 (2011) 2856 Syntheses and structures of zinc and tin(II) compounds with hemilabile N-silyl-tert-butylamido and N-silyl-p-tolylamido ligands that contain pendent tert-butoxy groups
Contents
Herein we report the synthesis of a holmium cubane cluster that exhibits a remarkably exposed central core. The cluster is ligated by seven chiral diketonate ligands that contain a protected carbohydrate group. Concomitant formation of an acetate co-ligand by deesterification of ethyl acetate yields interesting insights into the reactivity of lanthanoid cubane clusters towards simple ester species. The cluster has been characterised by MALDI mass spectrometry, elemental analysis and single crystal X-ray crystallography.
The synthesis and characterization of meso-tetra(4-carboxyphenyl)porphine (mTCPPD) coated SPION have been achieved successfully. Structural, surface, morphological, thermal and electrical properties of the nanocomposite were evaluated. TEM analysis of m-TCPPD coated SPION show an average particle size of 6.5 nm.
The present investigation reports the synthesis of a series of nickel(II) complexes [Ni(Opdac)2]Cl2 (1), [Ni(Opdac)2(CH3OH)2]Br2(CH3OH)2 (2), [Ni(Opdac)2]I2 (3), [Ni(Opdac)2NO3]NO3 (4) and [Ni(Opdac)2ClO4]ClO4 (5) with the Schiff base ligand, 4-(1-H-1,3-benzimidazole-2-yl)-1, 5-dimethyl-2-phenyl-1-2-dihydro-3-H-pyrazol-3-one (Opdac) and their characterization. In all the complexes, Opdac acts as neutral bidentate ligand forming six membered chelate ring around the central metal ion.
Hemilabile N,O amido-dimethylsilylalkoxy ligands create, depending on their mode of introduction, structurally-different metal complexes. Metatheses reactions of SnCl2 and ZnCl2 with the lithium salts of the amides gave mononuclear compounds with apparent spirocyclic structures. Aminolysis of ZnEt2, by contrast, furnished a tricyclic ladder structure, containing bridging amide ligands.
Contents
S. Salinas, M.A. Soto-Arriaza and B. Loeb Polyhedron 30 (2011) 2863 New iridium cyclometallated complexes with potential application in OLED
Adam Huczyn´ski, Jan Janczak and Bogumil Brzezinski Polyhedron 30 (2011) 2870 X-ray and FT-IR studies of structures of cyclic oxaalkyl diamide of o-phthalic acid and its complex with lead(II) perchlorate
Letitia L. Benade, Stephen O. Ojwach, Collins Obuah, Ilia A. Guzei and James Darkwa Polyhedron 30 (2011) 2878 Vinyl-addition polymerization of norbornene catalyzed by (pyrazol-1-ylmethyl)pyridine divalent iron, cobalt and nickel complexes
Robert A. Franich, Brian K. Nicholson, Hank W. Kroese, Suzanne S. Gallagher, Roger Meder, Joseph R. Lane and Brian D. Kelly Polyhedron 30 (2011) 2884 Synthesis, characterization and crystal structures of the boratranes: 2,10,11-trioxa-6-aza-1boratricyclo[4.4.4.01,6] tetradecane (tri-n-propanolamine borate), and 3-(4-methoxy)phenoxymethyl-7,10-dimethyl-2,8,9-trioxa-5-aza1-boratricyclo[3.3.3.01,5]-undecane
The photophysical properties of cyclometallated cationic iridium complexes that also contain substituted bipyridine ligands have been investigated in this work. The aliphatic chain on the substituent would avoid ordering in the solid state. The compounds show green-blue photoluminescence, showing in this way potentiality to be tested in OLED devices.
Cyclic oxaalkyl diamide of o-phthalic acid (CPhDA) and its complex with lead(II) perchlorate [CPhDA–Pb(ClO4)2–H2O (6:2:3)] in the crystalline form were obtained. The compounds were characterised by single crystal X-ray diffraction and by the FT-IR spectroscopy. The conformation of the CPhDA does not change significantly upon coordination of the Pb2+cation.
Activation of 2-(pyrazolylmethyl)pyridine and 2,6-bis(pyrazolylmethyl)pyridine nickel complexes with MAO produce active catalysts for the vinyl-addition polymerization of norbornene to give high molecular weight polymers. Analogous iron and cobalt complexes show lower catalytic activities under similar conditions.
The synthesis, spectroscopic properties and structures of two boratranes with five- or six-membered rings are reported. X-ray crystal structure results are compared with those of theoretical calculations, showing the importance of solvation/intermolecular contacts in controlling the length of the N fi B interaction.
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Mitsushiro Nomura, Noriko Sakamoto, Hirokazu Nakajima, Chikako FujitaTakayama, Toru Sugiyama and Masatsugu Kajitani Polyhedron 30 (2011) 2890 Syntheses and reactivities of azido coordinated CpCo(dithiolene) complexes
Azido coordinated dithiolene complexes [CpCo(N3){S2C2(CO2Me)2}(S-CHR1R2)], where R1, R2 = H (4a); R1 = H, R2 = SiMe3 (4b); R1 = H, R2 = CO2Et (4c), were synthesized. Among them, 4c was thermally (80 C) and
De-Zhi Hsaio, Jyh-Horung Chen, Shin-Shin Wang and Jo-Yu Tung Polyhedron 30 (2011) 2908 Structure and dynamic behavior of CF3CO2) in solution with a previously unknown g2 chelation mode to silver(I) in [Ag2(2-NCH2C6H5NCTPP)2]2+Æ[Ag2(O2CCF3)4]2)
Radosław Starosta, Aleksandra Bykowska, Maciej Barys, Anna K. Wieliczko, Zdzisław Staroniewicz and _ Małgorzata Jezowska-Bojczuk Polyhedron 30 (2011) 2914 Novel complexes of tris(aminomethyl)phosphanes with platinum(II): Structural, spectroscopic, DFT and biological activity studies
This work reports the X-ray crystal structure of one new diamagnetic silver inverted complex, 3-Ag(III,I). Dynamic 19F NMR spectra of the trifluoroacetato group in the anion of 3 (i.e., 3A) reveals that this group undergoes an intermolecular and isomerization exchange for the I(3A) … II(3A) process in CD2Cl2 solvent.
Structures and properties of two novel complexes: trans-[PtCl2{P(CH2N(CH2CH2)2Z)3}, where Z = O or NCH3 were determined spectroscopically and using X-ray crystallography and DFT methods. The biological activity and interactions with albumins and plasmid DNA of one of the complexes are presented.
R1
(
The reactions of N3P3Cl6 with mono and bis(4-fluorobenzyl) diamines produce tetrachloromono and bis(4-fluorobenzyl)monospirocyclophosphazenes. The mono-
R1
(
Phosphorus–nitrogen compounds part 22. Syntheses, structural investigations, biological activities and DNA interactions of new mono and bis (4-fluorobenzyl) spirocyclophosphazenes
chloro and fully substituted phosphazenes are obtained from the reactions of tetrachloro phosphazenes derivatives with excess pyrrolidine, morpholine and 1,4dioxa-8-azaspiro[4,5]decane (DASD). The structural investigations of the compounds have been verified by spectroscopy (MS, FTIR, 1H, 13C, 19F, 31P NMR, HSQC and HMBC) and X-ray diffraction techniques. DNA-binding and nature of interaction with pBR322 plasmid DNA are also studied and prevention of HindIII digestion with compounds indicates that the compounds bind with AT nucleotides in DNA.
(
Polyhedron 30 (2011) 2896
photochemically (UV) well reacted compared with the others to form the CR1R2bridged alkylidene adduct (2c; R1 = H, R2 = CO2Et), followed by a formal HN3 elimination. The electrochemical 1e) reduction of 4c underwent a formal N3) ligand elimination, and successive second reduction caused the CHR1R2 group elimination or reformed the CR1R2-bridged alkylidene adduct 2c.
(
Aytug˘ Okumus¸ , Zeynel Kılıç, Tuncer Hökelek, Hakan Dal, Leyla Açık, Yag˘mur Öner and L. Yasemin Koç
Contents
Cl
Cl
F
CH2
N
P N Cl Cl
N
P
P N
NR2
F
N
CH2
N
THF Cl
Cl
Cl
Cl
N
P
P N
NR2 P
P N Cl
R3
Cl
R3
N
P
R4
P
R3
N
O
R2=H or -CH2PhF
R3=
O
,N , N N R4=Cl or R3
O
Contents
Ngui Khiong Ngan, Kong Mun Lo and Chee Seng Richard Wong Polyhedron 30 (2011) 2922 Synthesis, structure studies and electrochemistry of molybdenum(VI) Schiff base complexes in the presence of different donor solvent molecules
Oxo-molybdenum chemistry is of great interest due to the presence of such units in the active sites of many enzymes, such as nitrogenase, aldehyde oxidase, xanthine oxidase, sulfite oxidase, nitrate reductase and xanthine dehydrogenate. Dioxomolyb-
Jan Janczak Polyhedron 30 (2011) 2933
denum complexes also play a pivotal role as catalysts in many important industrial processes, such as the oxidation of alcohols, olefin epoxidation and olefin metathesis. This work describes the synthesis, electrochemistry and structural features of a number of mononuclear dioxomolybdenum complexes containing dibasic tridentate Schiff base ligands. The synthesis and structures of dinuclear and polynuclear dioxomolybdenum complexes as well as the structure–catalytic activity relationship of these dioxomolybdenum complexes will be reported in subsequent research work.
dioxane does not change the colouring properties compared with the MgPc pigment.
4+1 and 4+2 coordinated complexes of magnesium phthalocyanine with dioxane
Two complexes of magnesium phthalocyanine with dioxane MgPc(dioxane)2 and ldioxane(MgPc)2 were obtained. The complexes co-crystallise in the centrosymmetric space group of the triclinic system. Due to the steric hindrance of the axial ligand, the crystals exhibit better solubility than the parent MgPc. Ligation of MgPc by
Nataliya P. Burkovskaya, Marina E. Nikiforova, Mikhail A. Kiskin, Anatoliy S. Lermontov, Artem S. Bogomyakov, Vladimir S. Mironov, Zhanna V. Dobrokhotova, Vasyl I. Pekhnyo, Aleksei A. Sidorov, Vladimir M. Novotortsev and Igor L. Eremenko Polyhedron 30 (2011) 2941 New dodecanuclear phenylphosphonatebridged Co(II) complexes
Abolghasem Bakhoda, Nasser Safari, Vahid Amani, Hamid Reza Khavasi and Mahin Gheidi Polyhedron 30 (2011) 2950 Dinuclear copper complexes of pyridylphenylphosphine ligands: Characterization of a mixedvalence CuII/CuI dimer
New dodecanuclear complexes [(l2-THF)5(g-HPiv)Co12(l3-OH)4(l6-O3PPh)4(l-Piv)12]Æ THFÆ2C6H6, [(l2-THF)6Co12(l3-OH)4(l6-O3PPh)4(l-Piv)12]Æ3THF and [(l2-Hmhp)6Co12(l3-OH)4(l6-O3PPh)4(l-Piv)12]Æ6.5 MeCN were synthesized. The magnetic properties and thermal decomposition of the dodecanuclear complexes were studied.
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Erratum Erratum to ‘‘Magnetization and EPR of a series of Cr3+ squarate dimers’’ [Polyhedron 29 (2010) 3021–3027] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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