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prelims, contents pages
Polyhedron 28, issue 4, 12 March 2009
Contents lists available at ScienceDirect
Polyhedron journal homepage: www.elsevier.com/locate/poly
Contents Papers Kou-Lin Zhang, Wei Liang, Yan Chang, Li-Min Yuan and Seik Weng Ng Polyhedron 28 (2009) 647
Syntheses, characterization and luminescent properties of two lead(II) fumarate metal-organic frameworks
Chaitali Biswas, Atish Dipankar Jana, Michael G.B. Drew, Golam Mostafa and Ashutosh Ghosh Polyhedron 28 (2009) 653
Segregated self-assembly and pillaring action of aliphatic dicarboxylic acids in the super structure of Cu–picolinate complexes
Maria do Socorro de P. Silva, Izaura C.N. Diógenes, Luis Gonzaga de F. Lopes, Ícaro de Sousa Moreira and Idalina M.M. de Carvalho Polyhedron 28 (2009) 661
Synthesis and physical properties of ruthenium bipyridine complexes with TCNQ and TCNE ligands
Elsevier Ltd.
Two photoluminescent lead(II) MOFs, {[Pb2(fum)2(H2O)4] Æ 2H2O}n (1) and [Pb(fum)]n (2), were synthesized by the reaction of the fum dianion with the lead(II) ion in the presence of pyrazole and pyrazine, respectively. The arrangement of the ligands exhibits a coordination gap around the Pb atom, occupied possibly by a stereoactive lone pair of electrons on lead(II), with the coordination around both the eightcoordinated lead atom in 1 and six-coordinated lead atom in 2 exhibiting a hemidirected geometry. The fum ligand shows different ligation behavior toward the lead(II) ions in these complexes.
Co-crystals of [Cu(2-picolinate)2] and malonic or succinic acid reveal that supramolecular association of the monomeric complex units leads to the formation of layers through hydrogen bonding. The co-crystallized dicarboxylic acid connects these 2-D layers, acting as pillars to form the final 3-D supramolecular structure.
The physical properties such as charge uptake, absorption, emission, and oxidation state of the TCNX ligands in the [Ru(bpy)(dcbH2)(TCNQ)Cl] complexes, and [Ru(bpy)(dcbH2)(TCNE)Cl] where bpy = 2,20 -bipyridine and dcbH2 = 4,40 dicarboxy-2,20 -bipyridine, were investigated. The obtained results suggest not only the anion radical form, TCNX•), for the TCNX ligands upon coordination, but also that the TCNE species presents a higher charge uptake capability than TCNQ ligand.
iv
Md. Mijanuddin, Atish Dipankar Jana, Michael G.B. Drew, Chang Seop Hong, Basab Chattopadhyay, Monika Mukherjee, Mahasweta Nandi, Asim Bhaumik, Madeline Helliwell, Golam Mostafa and Mahammad Ali Polyhedron 28 (2009) 665
Contents
Two concomitant polymorphic coordination complexes (I and II) have been characterized crystallographically. Complex I shows the presence of a strong antiferromagnetic interaction and good catalytic efficiency in the liquid phase partial oxidation of olefins when immobilized on 2D-hexagonal mesoporous silica.
Concomitant polymorphism of an antiferromagnetically coupled dicopper(II,II) complex with single strand helical assembly: Synthesis, structure, DSC, magnetic and heterogeneous catalytic studies
Feng-Shou Liu, Hai-Yang Gao, Ke-Ming Song, Ye Zhao, Jie-Ming Long, Ling Zhang, Fang-Ming Zhu and Qing Wu Polyhedron 28 (2009) 673
Neutral nickel complexes chelating monoamidinate ligands: Syntheses, characterizations and catalytic properties toward ethylene oligomerization and norbornene polymerization
Xiao-Feng Xie, San-Ping Chen, Zheng-Qiang Xia and Sheng-Li Gao Polyhedron 28 (2009) 679
Construction of metal–organic frameworks with transitional metals based on the 3,5bis(4-pyridyl)-1H-1,2,4-triazole ligand
Seema Maheshwari, John E. Drake, Kavita Kori, Mark E. Light and Raju Ratnani Polyhedron 28 (2009) 689
Synthesis and spectroscopic characterization of tris(O,O0 -ditolyl dithiophosphato) arsenic/antimony/bismuth(III) compounds: Crystal structures of [As{S2P(OC6H4Me-m)2}3] Æ 0.5C6H14, [Sb{S2P(OC6H4Me-m)2}3] and [Bi{S2P(OC6H4Me-m)2}3]
Three monoamidinate nickel complexes were synthesized, characterized and used as precatalyst for ethylene oligomerization and norbronene polymerization. The nickel complexes oligomerized ethylene producing a mixture of dimers and trimers with a moderate turnover frequency, while exhibited very high activity for the vinyl-addition polymerization of norbornene in the presence of MAO.
The versatile ligand 3,5-bis(4-pyridyl)-1H1,2,4-triazole was synthesized using an in situ metal/ligand reaction. Based on which, six coordination complexes have been prepared, in which the bpt ligand manages the metal ions to form 0-D point, (4,4) layers and a variety of 3-D (412 Æ 63), (64 Æ 82) topological networks.
Arsenic(III), antimony(III) and bismuth(III) compounds of the type, [M{S2P(OR)2}3] (where M = As, Sb and Bi; R = o-, m-, p-C6H4Me) were obtained. These compounds were characterized by elemental analysis, IR, 1H NMR and 31P NMR spectroscopy. The single crystal X-ray structures of three representative compounds, [As{S2P(OC6[Sb{S2P(OC6H4MeH4Me-m)2}3] Æ 0.5C6H14, m)2}3] and [Bi{S2P(OC6H4Me-m)2}3] were determined.
Me
Me OH
HO N N
Me
Cu(OAc)2. 2 H2O Me
Me Me
I II
Contents
Santarupa Thakurta, Partha Roy, Georgina Rosair, Carlos J. Gómez-García, Eugenio Garribba and Samiran Mitra Polyhedron 28 (2009) 695
Ferromagnetic exchange coupling in a new bis(l-chloro)-bridged copper(II) Schiff base complex: Synthesis, structure, magnetic properties and catalytic oxidation of cycloalkanes
Nilofar Soltanzadeh and Ali Morsali Polyhedron 28 (2009) 703
Metal–organic supramolecular assemblies generated from bismuth(III) bromide and polyimine ligands
Samik Gupta, Sachindranath Pal, Anil Kumar Barik, Somnath Roy, Arijit Hazra, Tarak Nath Mandal, Ray J. Butcher and Susanta Kumar Kar Polyhedron 28 (2009) 711
Molybdenum(VI) complexes of a few pyrimidine derived ligands and the study of metal mediated C@N bond cleavage resulting in ligand transformation during complex formation
Iwona B. Szyman´ska, Piotr Piszczek and Edward Szłyk Polyhedron 28 (2009) 721
Gas phase studies of new copper(I) carboxylates compounds with vinylsilanes and their application in Chemical Vapor Deposition (CVD)
v
A new doubly chloro-bridged complex [Cu(HL)Cl]2 Æ H2O (1) has been prepared using a ONO donor Schiff base ligand H2L, 2-((E)(2-hydroxyethylimino)methyl)-4-bromophenol. Each copper(II) atom in the dimer is squarepyramidal having an axial–equatorial configuration of the bridging chlorine atoms. Temperature dependence of magnetic susceptibility measurements show a high ferromagnetic coupling between two copper(II) ions in 1 with J = +43.2(5) cm)1. The complex also exhibits efficient catalytic properties leading to the facile oxidation of cyclohexane and cycloheptane in presence of hydrogen peroxide as terminal oxidant.
Three new BiBr3 supramolecular complexes, [Bi2(3-bpdb)2Br8]Æ(3-H2bpdb) (1), [Bi2(3-Hbpdh)2Br8] (2) and [Bi2(4-bpdh)Br9]Æ3(4-Hbpdh) (3) {3-bpdb = 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, 3-bpdh = 2,5-bis(3-pyridyl)-3,4-diaza2,4-hexadiene and 4-bpdh = 2,5-bis(4-pyridyl)3,4-diaza-2,4-hexadiene} have been prepared by the reaction of bismuth(III) bromide with three organic nitrogen donor based ligands under thermal gradient conditions using the branched tube method.
The syntheses of three mononuclear dioxomolybdenum (VI) complexes and a binuclear oxo l-oxo molybdenum(VI) complex have been described. Three of these four complexes are the result of an in situ transformation of the used pyrimidine derived Schiff base ligands. The ligand transformation may have been initiated by Mo mediated C@N bond cleavage.
Complexes [Cu(vinylsilane)(l-O2CC2F5)]n can be the source of the volatile derivative [Cu2(O2CC2F5)2], which can be transported in the CVD process and decomposed forming copper materials.
X H3C
NH
N CH3
Mo
MoO2(acac)2 O
O
O Cl
HL 1
X
+
N
N
H3C
NH
N
+ HCl
complexation
N
HL2 MoO2(acac)2
HO
+
CH3
H3C
+ N
N
HCl
N
H3C Cl
CH3
X=H, HL1 X=CH3, HL2
N
N
ligand transformation
O
Mo
CH3 Cl
O
vi
Mitchell P. Sternlieb, Heather M. Brown, Charles D. Schaeffer Jr. and Claude H. Yoder Polyhedron 28 (2009) 729
The synthesis of apatites with an organophosphate and in nonaqueous media
Iran Sheikhshoaie, Abdolreza Rezaeifard, Niaz Monadi and Samira Kaafi Polyhedron 28 (2009) 733
A novel tridentate Schiff base dioxo-molybdenum(VI) complex: Synthesis, crystal structure and catalytic performance in green oxidation of sulfides by urea hydrogen peroxide
Neil F. Curtis, Kelly Flood, Clifton E. Rickard, Ward T. Robinson and Joyce M. Waters Polyhedron 28 (2009) 739
The structures of some (hexamethyl-1,5,9,13tetraazacyclohexadecadiene)copper(II) compounds
C. Rémazeilles and Ph. Refait Polyhedron 28 (2009) 749
Fe(II) hydroxycarbonate Fe2(OH)2CO3 (chukanovite) as iron corrosion product: Synthesis and study by Fourier Transform Infrared Spectroscopy
Contents
Ten apatites were synthesized in nonaqueous solvents and three (PbApF, PbApCl, SrApCl) were obtained using trimethylphosphate as the phosphate source. The use of nonaqueous solvents alleviates the formation of hydrogen phosphates which occurs in aqueous solution for some divalent cations.
nonaqueous M2+ + PO43- + X-
or trimethylphosphate
A new dioxo-molybdenum(VI) complex [MoO2(L)(CH3OH)] has been synthesized using a tridentate ONO Schiff base ligand (H2L). The X-ray crystallography showed a monoclinic space group P21/c for this complex. The high catalytic activity of this Schiff base complex has been observed in the oxidation of sulfides by urea hydrogen peroxide in ethanol with high/ excellent yields and selectivity.
Bis(propane-1,3-diamine)copper(II) perchlorate reacts with acetone to form both the trans-diimine, (6,8,8,14,16,16-hexamethyl-1,5,9,13-tetraazacyclohexadeca-5,13-diene)copper(II), and cis-diimine, (6,8,8,14,14,16-hexamethyl1,5,9,13-tetraazacyclohexadeca-5,1(16)-diene)copper(II) macrocyclic cations. The structures of [Cu(Me6[16]diene)](ClO4)2, N-rac-[Cu(cis[Cu(Me6[16]diene)Me6[16]diene)][ZnCl4], (NCS)]ClO4 and [Cu(Me6[16]diene)(l-NC)Ni(CN)3] Æ H2O are reported.
Fe(OH)2 was prepared by mixing FeCl2 Æ 4H2O and NaOH solutions. A NaHCO3 solution was then added to the suspension, so that [NaHCO3]/[NaOH] = 0.9. The system was aged at RT. ATR/FT-IR spectra after 24 h and 2 months show that the precipitate transformed progressively into chukanovite.
Me
H2N
2+
NH2
H2N
Me
Me
Me HN
NH
N
Me
+
Cu
NH2
HN
Cu HN
N
Me Me
N 2+
2+
acetone
Cu
Me
N
Me Me
Me
Me
Contents
Heléne Gamstedt, Anders Hagfeldt and Lars Kloo Polyhedron 28 (2009) 757
Photoelectrochemical studies of ionic liquidcontaining solar cells sensitized with different polypyridyl–ruthenium complexes
Valeria M. Nurchi, Guido Crisponi, Tiziana Pivetta, Enzo Tramontano, Flaminia Cesare Marincola and Joanna I. Lachowicz Polyhedron 28 (2009) 763
Interaction between aspergillic acid and iron(III): A potentiometric, UV–Vis, 1H NMR and quantum chemical study
Florian P. Pruchnik, Hanna Pruchnik and Andrzej Kochel Polyhedron 28 (2009) 769
Structure and properties of tetra-l-ethanimidamidato-jN:jN0 -dirhodium(1+) complexes
Salma Kiani, Richard J. Staples, S. Ted Treves and Alan B. Packard Polyhedron 28 (2009) 775
Synthesis and characterization of a tetramethyl furanone functionalized diiminedioxime, a potential ligand for 64Cu radiopharmaceuticals, and its copper(II) and nickel(II) complexes
vii
The efficiency of a selection of ionic liquid electrolytes combined with standard, hydrophobic and cationic organometallic sensitizing dyes have been investigated as components in dye-sensitized solar cells. Also effects of co-adsorbent and nanoparticle additives to the electrolytes have been investigated.
The complex formation equilibria of aspergillic acid with iron(III) were studied potentiometrically and spectrophotometrically. Some structural features of ligand, prepared biosynthetically, are discussed on the basis of NMR results. Iron(III) coordination model is examined on the grounds of quantum chemical calculations and compared with those of two other cyclic hydroxamates.
Reaction of Na4[Rh2(l-CO3)4] with ethanimidamide hydrochloride leads to the [Rh2{lHN(HN@)CCH3}4L2]Cl complexes. DFT calculations and EPR spectra indicate that dRhRh is SOMO orbital. The rhodium atoms are equivalent in the [Rh2{l-HN(HN@)CCH3}4L2]+ compounds, and nonequivalent in [Rh2{lHN(HN@)CCH3}4LL0 ]+ complexes. The intense bands in the electronic spectra in the range 13 000–19 000 cm)1 are caused by transitions with prevailing d–d character.
A novel anionic diiminedioxime ligand containing two tetramethylfuranone moieties was prepared. A Cu(II)-bridged dimer was observed when the complex was prepared in ethanol. However, an acetone adduct of the ligand was observed when the complex was prepared in acetonitrile and acetone (figure). The Ni(II) complex is a square planar monomer.
C6
C5c
C5 C9
O5 C11 C4
C8
C3 N2
C12
C13
C20
C1
C2
N3
N1 C10 C7
C14 Cu1
C17 O4
N4 C15
O1 O2
C16
C19
C18 C21
viii
Benito Flores-Chávez, José G. Alvarado-Rodríguez, Noemí Andrade-López, Verónica García-Montalvo and Eliazar Aquino-Torres Polyhedron 28 (2009) 782
Contents
The synthesis of [{S(C6H3S)2O}GeRnHal2)n] compounds (R = Et, Ph; Hal = Cl, Br; n = 2–0) is described. The acidity of the GeRHal2+ fragment enhances a transannular OÆÆÆGe interaction, prompting a trigonal bipyramidal germanium local geometry; the GeR22+ less acid fragment present has an opposite effect.
Hypervalence in germanium compounds containing the tetracylic moiety {S(C6H3S)2O}Ge via OÆÆÆGe transannular interactions: A structural study
Mark A. Fox, J.A. Hugh MacBride, Richard J. Peace, William Clegg, Mark R.J. Elsegood and Kenneth Wade Polyhedron 28 (2009) 789
Improved syntheses of nitroso-carboranes and dicarboranylamines are described and crystal and structures of PhCB10H10CNO [(PhCB10H10C)2N]) reveal cage C…C distances of 1.68 and 1.99 Å, respectively.
Ph
C C
N New synthetic and structural studies on nitroso-ortho-carboranes RCB10H10CNO and bis(ortho-carboranyl)amines (RCB10H10C)2NH (R = Ph or Me)
Aurkie Ray, Georgina M. Rosair, Ramakant Kadam and Samiran Mitra Polyhedron 28 (2009) 796
Three new mono–di–trinuclear cobalt complexes of selectively and non-selectively condensed Schiff bases with N2O and N2O2 donor sets: Syntheses, structural variations, EPR and DNA binding studies
Muhammad Shahid, Muhammad Mazhar, Paul O Brien, Mohammad A. Malik and James Raftery Polyhedron 28 (2009) 807
Low temperature and single-source synthesis of a CuO–Ba2Cu3O5+x composite: Fabrication of thin films and characterization
C C
Three new mono–di–trinuclear cobalt complexes of three different Schiff bases have been synthesised. Of the three Schiff bases, HL1 and HL2 were obtained by selective condensation of two different 1,3-diamines with 2-hydroxyacetophenone and H2L3 resulted from the non-selective condensation of 1,3-diamine with 2-hydroxyacetophenone. The three complexes have been characterised using IR, UV–Vis spectroscopy and cyclic voltammetry. Structural aspects of the cobalt complexes have been described by performing single crystal X-ray analysis. EPR analysis and DNA binding abilities of the complexes have also been studied in detail.
The heterobimetallic complex Ba2(l-OAc)4(OAc)2Cu4(l-dmae)4(OH)2 (1), synthesized by the direct reaction of Ba(dmae)2 and Cu(OAc)2 Æ H2O in toluene, was characterized by melting point, CHNS, FT-IR, TGA, mass spectrometry and single crystal X-ray diffraction. Complex (1) was used at 400 C to deposit thin films of CuO–Ba2Cu3O5+x composite which were characterized by XRPD, SEM and EDX.
Ph
Contents
Debdulal Maity, Shouvik Chattopadhyay, Ashutosh Ghosh, Michael G.B. Drew and Gurucharan Mukhopadhyay Polyhedron 28 (2009) 812
Syntheses, characterization and X-ray crystal structures of Ni(II) complexes of tridentate monocondensed and tetradentate dicondensed Schiff bases
Joy Chakraborty, Santarupa Thakurta, Guillaume Pilet, Dominique Luneau and Samiran Mitra Polyhedron 28 (2009) 819
A novel tetra(l3-phenoxo) bridged copper(II) Schiff base complex containing a Cu4O4 cubane core: Synthesis, structural aspects and magneto-structural correlations
Eric Shyu and Robert L. LaDuca Polyhedron 28 (2009) 826
Divalent metal succinate/perchlorate coordination polymers incorporating a kinked hydrogenbonding capable diimine: Chains, layers and a (5,6)-connected binodal network featuring alternating rectangular and hexagonal grids
Manju Rajeswaran, Thomas N. Blanton, Ching W. Tang, William C. Lenhart, Steven C. Switalski, David J. Giesen, Brian J. Antalek, Thomas D. Pawlik, Denis Y. Kondakov, Nicholas Zumbulyadis and Ralph H. Young Polyhedron 28 (2009) 835
Structural, thermal, and spectral characterization of the different crystalline forms of Alq3, tris(quinolin-8-olato)aluminum(III), an electroluminescent material in OLED technology
The unsymmetrical tetradentate Schiff base ligands involving 1,2-diaminoethane or 1,2-diaminopropane with 2,4-pentanedione and diacetylmonoxime forms square planar complexes with Ni(II) whereas complexes of symmetrical ligands involving the same diamines and diacetylmonoxime cannot be prepared; instead the bis six-coordinate complex of the monocondensed tridentate Schiff bases were produced.
A novel tetranuclear copper(II) complex [Cu4L4] Æ Na Æ ClO4 has been synthesized exploiting the tetradentate donor set of a hydrazone ligand N0 -(2-hydroxy-3-methoxybenzylidene)H2L, benzohydrazide. The Cu4O4 core consists of a rare l3-phenoxo-bridged copper(II) atoms giving an approximately cubic array of alternating copper and oxygen atoms. Cryomagnetic susceptibility measurements over a wide range of temperature (2–300 K) demonstrate both ferro[J11 = +13.6(4) cm)1] and antiferromagnetic [J12 = )34.9(4) cm)1] interactions in a 2J model resulting in an overall antiferromagnetic behaviour of the magnetically coupled system.
Hydrothermal synthesis has afforded succinate (suc) or 2,2-dimethylsuccinate (dmsuc) perchlorate coordination polymers incorporating the hydrogen-bonding capable tethering ligand 4,40 -dipyridylamine (dpa). {[Co(suc)(Hdpa)2(H2O)2](ClO4)2 Æ 7.5H2O}n (1) manifests simple cationic 1D polymeric chains, while {[Cd3(suc)2.5(dpa)2](ClO4)}n (2) possesses a 3D binodal (5,6)-connected network. The network of 2 can be viewed as alternating (4,4) rectangular and (6,3) hexagonal grids being joined by pillaring ligands. The gem-dimethyl substituents within the dmsuc ligands promote a 2D (6,3) herringbone net in {[Cd2(dmsuc)2(dpa)(Hdpa)](ClO4) Æ 6H2O}n (3).
The interest in organic materials for use in organic light-emitting diodes (OLEDs) began with the pioneering report of efficient green electroluminescence from Alq3, by Tang VanSlyke. Alq3 is used in the electron transport and/or electron-injecting layer in OLED devices. In the present report, a combined structural, thermal, and spectroscopic analysis of different crystalline phases of Alq3 is presented.
ix
x
Gajendra Gupta, Glenn P.A. Yap, Bruno Therrien and Kollipara Mohan Rao Polyhedron 28 (2009) 844
Study of novel g5-cyclopentadienyl and g6arene platinum group metal complexes containing a N4-type ligand and their structural characterization
Diana Visinescu, Luminita M. Toma, Oscar Fabelo, Catalina Ruiz-Pérez, Francesc Lloret and Miguel Julve Polyhedron 28 (2009) 851
New 3d–4f supramolecular systems constructed by [Fe(bipy)(CN)4]) and partially blocked lanthanide cations
Alfonso Castiñeiras, Isabel García-Santos and José M. Varela Polyhedron 28 (2009) 860
A manganese(II) coordination polymer with a 3D porous structure: Synthesis, structure, and spectroscopic and magnetic behaviour
Contents
Reactions of platinum group metal complexes containing g5-and g6-cyclic hydrocarbons with a N4 donor ligand, viz. 3,5-bis(2-pyridyl)pyrazole (bpp-H), yielded mono- and dinuclear complexes. The molecular structures of [1]PF6, [5]PF6 and [8]BF4 have been established by single crystal X-ray diffraction studies
The two different 3D supramolecular arrangements in the 3d–4f isostructural series [Fe(bipy)(CN)4][Ln(bpym)(NO3)2(H2O)3] Æ H2O Æ CH3CN [Ln = Sm (1), Gd (2), Tb (3), Dy (4) and Ho (5)] (left) and [Fe(bipy)(CN)4][Ln(bpym)(NO3)2(H2O)4] [Ln = Pr (6), Nd (7), Sm (8) and Gd (9)] (right) are dictated by the lanthanide geometry (mono- or bicapped square antiprism) which is in turn influenced by the nature of the solvent used in the synthesis and the distinct ionic radii of the trivalent rare-earth ions.
A novel MnII coordination polymer with a porous 3D structure was prepared by the reaction between N,N0 -bis(carboxymethyl)dithiooxamide and manganese(II) perchlorate. Variable temperature magnetic measurements reveal the existence of very weak antiferromagnetic interactions through the carboxylate bridge.
Contents
Zhang-Peng Li, Yong-Heng Xing, Yun-Zhu Cao, Xiao-Qing Zeng, Mao-Fa Ge and Shu-Yun Niu Polyhedron 28 (2009) 865
Synthesis, structure and properties of a series of scorpionate oxovanadium(IV)–carboxylate complexes
The one-step reaction of VOSO4 Æ nH2O, pyrazole or 3,5-dimethylpyrazole, potassium poly(pyrazolyl)borate and carboxylic acids in methanol resulted in six new complexes, 1–6. The synthetic process described here is different from those in literature reports. Structural analyses show that in all of these complexes, the vanadium atoms are six-coordinated with a N4O2 donor set in a distorted-octahedral geometry, the carboxylate groups are coordinated as monodentate and the uncoordinated oxygen atom of the carboxylate groups form intra- or inter-molecular hydrogen bonds with the NH group of the corresponding coordinated neutral pyrazole (pzH/pzH*).
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xi
Contents lists available at ScienceDirect
Polyhedron journal homepage: www.elsevier.com/locate/poly
Contents Papers Kou-Lin Zhang, Wei Liang, Yan Chang, Li-Min Yuan and Seik Weng Ng Polyhedron 28 (2009) 647
Syntheses, characterization and luminescent properties of two lead(II) fumarate metal-organic frameworks
Chaitali Biswas, Atish Dipankar Jana, Michael G.B. Drew, Golam Mostafa and Ashutosh Ghosh Polyhedron 28 (2009) 653
Segregated self-assembly and pillaring action of aliphatic dicarboxylic acids in the super structure of Cu–picolinate complexes
Maria do Socorro de P. Silva, Izaura C.N. Diógenes, Luis Gonzaga de F. Lopes, Ícaro de Sousa Moreira and Idalina M.M. de Carvalho Polyhedron 28 (2009) 661
Synthesis and physical properties of ruthenium bipyridine complexes with TCNQ and TCNE ligands
Elsevier Ltd.
Two photoluminescent lead(II) MOFs, {[Pb2(fum)2(H2O)4] Æ 2H2O}n (1) and [Pb(fum)]n (2), were synthesized by the reaction of the fum dianion with the lead(II) ion in the presence of pyrazole and pyrazine, respectively. The arrangement of the ligands exhibits a coordination gap around the Pb atom, occupied possibly by a stereoactive lone pair of electrons on lead(II), with the coordination around both the eightcoordinated lead atom in 1 and six-coordinated lead atom in 2 exhibiting a hemidirected geometry. The fum ligand shows different ligation behavior toward the lead(II) ions in these complexes.
Co-crystals of [Cu(2-picolinate)2] and malonic or succinic acid reveal that supramolecular association of the monomeric complex units leads to the formation of layers through hydrogen bonding. The co-crystallized dicarboxylic acid connects these 2-D layers, acting as pillars to form the final 3-D supramolecular structure.
The physical properties such as charge uptake, absorption, emission, and oxidation state of the TCNX ligands in the [Ru(bpy)(dcbH2)(TCNQ)Cl] complexes, and [Ru(bpy)(dcbH2)(TCNE)Cl] where bpy = 2,20 -bipyridine and dcbH2 = 4,40 dicarboxy-2,20 -bipyridine, were investigated. The obtained results suggest not only the anion radical form, TCNX•), for the TCNX ligands upon coordination, but also that the TCNE species presents a higher charge uptake capability than TCNQ ligand.
iv
Md. Mijanuddin, Atish Dipankar Jana, Michael G.B. Drew, Chang Seop Hong, Basab Chattopadhyay, Monika Mukherjee, Mahasweta Nandi, Asim Bhaumik, Madeline Helliwell, Golam Mostafa and Mahammad Ali Polyhedron 28 (2009) 665
Contents
Two concomitant polymorphic coordination complexes (I and II) have been characterized crystallographically. Complex I shows the presence of a strong antiferromagnetic interaction and good catalytic efficiency in the liquid phase partial oxidation of olefins when immobilized on 2D-hexagonal mesoporous silica.
Concomitant polymorphism of an antiferromagnetically coupled dicopper(II,II) complex with single strand helical assembly: Synthesis, structure, DSC, magnetic and heterogeneous catalytic studies
Feng-Shou Liu, Hai-Yang Gao, Ke-Ming Song, Ye Zhao, Jie-Ming Long, Ling Zhang, Fang-Ming Zhu and Qing Wu Polyhedron 28 (2009) 673
Neutral nickel complexes chelating monoamidinate ligands: Syntheses, characterizations and catalytic properties toward ethylene oligomerization and norbornene polymerization
Xiao-Feng Xie, San-Ping Chen, Zheng-Qiang Xia and Sheng-Li Gao Polyhedron 28 (2009) 679
Construction of metal–organic frameworks with transitional metals based on the 3,5bis(4-pyridyl)-1H-1,2,4-triazole ligand
Seema Maheshwari, John E. Drake, Kavita Kori, Mark E. Light and Raju Ratnani Polyhedron 28 (2009) 689
Synthesis and spectroscopic characterization of tris(O,O0 -ditolyl dithiophosphato) arsenic/antimony/bismuth(III) compounds: Crystal structures of [As{S2P(OC6H4Me-m)2}3] Æ 0.5C6H14, [Sb{S2P(OC6H4Me-m)2}3] and [Bi{S2P(OC6H4Me-m)2}3]
Three monoamidinate nickel complexes were synthesized, characterized and used as precatalyst for ethylene oligomerization and norbronene polymerization. The nickel complexes oligomerized ethylene producing a mixture of dimers and trimers with a moderate turnover frequency, while exhibited very high activity for the vinyl-addition polymerization of norbornene in the presence of MAO.
The versatile ligand 3,5-bis(4-pyridyl)-1H1,2,4-triazole was synthesized using an in situ metal/ligand reaction. Based on which, six coordination complexes have been prepared, in which the bpt ligand manages the metal ions to form 0-D point, (4,4) layers and a variety of 3-D (412 Æ 63), (64 Æ 82) topological networks.
Arsenic(III), antimony(III) and bismuth(III) compounds of the type, [M{S2P(OR)2}3] (where M = As, Sb and Bi; R = o-, m-, p-C6H4Me) were obtained. These compounds were characterized by elemental analysis, IR, 1H NMR and 31P NMR spectroscopy. The single crystal X-ray structures of three representative compounds, [As{S2P(OC6[Sb{S2P(OC6H4MeH4Me-m)2}3] Æ 0.5C6H14, m)2}3] and [Bi{S2P(OC6H4Me-m)2}3] were determined.
Me
Me OH
HO N N
Me
Cu(OAc)2. 2 H2O Me
Me Me
I II
Contents
Santarupa Thakurta, Partha Roy, Georgina Rosair, Carlos J. Gómez-García, Eugenio Garribba and Samiran Mitra Polyhedron 28 (2009) 695
Ferromagnetic exchange coupling in a new bis(l-chloro)-bridged copper(II) Schiff base complex: Synthesis, structure, magnetic properties and catalytic oxidation of cycloalkanes
Nilofar Soltanzadeh and Ali Morsali Polyhedron 28 (2009) 703
Metal–organic supramolecular assemblies generated from bismuth(III) bromide and polyimine ligands
Samik Gupta, Sachindranath Pal, Anil Kumar Barik, Somnath Roy, Arijit Hazra, Tarak Nath Mandal, Ray J. Butcher and Susanta Kumar Kar Polyhedron 28 (2009) 711
Molybdenum(VI) complexes of a few pyrimidine derived ligands and the study of metal mediated C@N bond cleavage resulting in ligand transformation during complex formation
Iwona B. Szyman´ska, Piotr Piszczek and Edward Szłyk Polyhedron 28 (2009) 721
Gas phase studies of new copper(I) carboxylates compounds with vinylsilanes and their application in Chemical Vapor Deposition (CVD)
v
A new doubly chloro-bridged complex [Cu(HL)Cl]2 Æ H2O (1) has been prepared using a ONO donor Schiff base ligand H2L, 2-((E)(2-hydroxyethylimino)methyl)-4-bromophenol. Each copper(II) atom in the dimer is squarepyramidal having an axial–equatorial configuration of the bridging chlorine atoms. Temperature dependence of magnetic susceptibility measurements show a high ferromagnetic coupling between two copper(II) ions in 1 with J = +43.2(5) cm)1. The complex also exhibits efficient catalytic properties leading to the facile oxidation of cyclohexane and cycloheptane in presence of hydrogen peroxide as terminal oxidant.
Three new BiBr3 supramolecular complexes, [Bi2(3-bpdb)2Br8]Æ(3-H2bpdb) (1), [Bi2(3-Hbpdh)2Br8] (2) and [Bi2(4-bpdh)Br9]Æ3(4-Hbpdh) (3) {3-bpdb = 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, 3-bpdh = 2,5-bis(3-pyridyl)-3,4-diaza2,4-hexadiene and 4-bpdh = 2,5-bis(4-pyridyl)3,4-diaza-2,4-hexadiene} have been prepared by the reaction of bismuth(III) bromide with three organic nitrogen donor based ligands under thermal gradient conditions using the branched tube method.
The syntheses of three mononuclear dioxomolybdenum (VI) complexes and a binuclear oxo l-oxo molybdenum(VI) complex have been described. Three of these four complexes are the result of an in situ transformation of the used pyrimidine derived Schiff base ligands. The ligand transformation may have been initiated by Mo mediated C@N bond cleavage.
Complexes [Cu(vinylsilane)(l-O2CC2F5)]n can be the source of the volatile derivative [Cu2(O2CC2F5)2], which can be transported in the CVD process and decomposed forming copper materials.
X H3C
NH
N CH3
Mo
MoO2(acac)2 O
O
O Cl
HL 1
X
+
N
N
H3C
NH
N
+ HCl
complexation
N
HL2 MoO2(acac)2
HO
+
CH3
H3C
+ N
N
HCl
N
H3C Cl
CH3
X=H, HL1 X=CH3, HL2
N
N
ligand transformation
O
Mo
CH3 Cl
O
vi
Mitchell P. Sternlieb, Heather M. Brown, Charles D. Schaeffer Jr. and Claude H. Yoder Polyhedron 28 (2009) 729
The synthesis of apatites with an organophosphate and in nonaqueous media
Iran Sheikhshoaie, Abdolreza Rezaeifard, Niaz Monadi and Samira Kaafi Polyhedron 28 (2009) 733
A novel tridentate Schiff base dioxo-molybdenum(VI) complex: Synthesis, crystal structure and catalytic performance in green oxidation of sulfides by urea hydrogen peroxide
Neil F. Curtis, Kelly Flood, Clifton E. Rickard, Ward T. Robinson and Joyce M. Waters Polyhedron 28 (2009) 739
The structures of some (hexamethyl-1,5,9,13tetraazacyclohexadecadiene)copper(II) compounds
C. Rémazeilles and Ph. Refait Polyhedron 28 (2009) 749
Fe(II) hydroxycarbonate Fe2(OH)2CO3 (chukanovite) as iron corrosion product: Synthesis and study by Fourier Transform Infrared Spectroscopy
Contents
Ten apatites were synthesized in nonaqueous solvents and three (PbApF, PbApCl, SrApCl) were obtained using trimethylphosphate as the phosphate source. The use of nonaqueous solvents alleviates the formation of hydrogen phosphates which occurs in aqueous solution for some divalent cations.
nonaqueous M2+ + PO43- + X-
or trimethylphosphate
A new dioxo-molybdenum(VI) complex [MoO2(L)(CH3OH)] has been synthesized using a tridentate ONO Schiff base ligand (H2L). The X-ray crystallography showed a monoclinic space group P21/c for this complex. The high catalytic activity of this Schiff base complex has been observed in the oxidation of sulfides by urea hydrogen peroxide in ethanol with high/ excellent yields and selectivity.
Bis(propane-1,3-diamine)copper(II) perchlorate reacts with acetone to form both the trans-diimine, (6,8,8,14,16,16-hexamethyl-1,5,9,13-tetraazacyclohexadeca-5,13-diene)copper(II), and cis-diimine, (6,8,8,14,14,16-hexamethyl1,5,9,13-tetraazacyclohexadeca-5,1(16)-diene)copper(II) macrocyclic cations. The structures of [Cu(Me6[16]diene)](ClO4)2, N-rac-[Cu(cis[Cu(Me6[16]diene)Me6[16]diene)][ZnCl4], (NCS)]ClO4 and [Cu(Me6[16]diene)(l-NC)Ni(CN)3] Æ H2O are reported.
Fe(OH)2 was prepared by mixing FeCl2 Æ 4H2O and NaOH solutions. A NaHCO3 solution was then added to the suspension, so that [NaHCO3]/[NaOH] = 0.9. The system was aged at RT. ATR/FT-IR spectra after 24 h and 2 months show that the precipitate transformed progressively into chukanovite.
Me
H2N
2+
NH2
H2N
Me
Me
Me HN
NH
N
Me
+
Cu
NH2
HN
Cu HN
N
Me Me
N 2+
2+
acetone
Cu
Me
N
Me Me
Me
Me
Contents
Heléne Gamstedt, Anders Hagfeldt and Lars Kloo Polyhedron 28 (2009) 757
Photoelectrochemical studies of ionic liquidcontaining solar cells sensitized with different polypyridyl–ruthenium complexes
Valeria M. Nurchi, Guido Crisponi, Tiziana Pivetta, Enzo Tramontano, Flaminia Cesare Marincola and Joanna I. Lachowicz Polyhedron 28 (2009) 763
Interaction between aspergillic acid and iron(III): A potentiometric, UV–Vis, 1H NMR and quantum chemical study
Florian P. Pruchnik, Hanna Pruchnik and Andrzej Kochel Polyhedron 28 (2009) 769
Structure and properties of tetra-l-ethanimidamidato-jN:jN0 -dirhodium(1+) complexes
Salma Kiani, Richard J. Staples, S. Ted Treves and Alan B. Packard Polyhedron 28 (2009) 775
Synthesis and characterization of a tetramethyl furanone functionalized diiminedioxime, a potential ligand for 64Cu radiopharmaceuticals, and its copper(II) and nickel(II) complexes
vii
The efficiency of a selection of ionic liquid electrolytes combined with standard, hydrophobic and cationic organometallic sensitizing dyes have been investigated as components in dye-sensitized solar cells. Also effects of co-adsorbent and nanoparticle additives to the electrolytes have been investigated.
The complex formation equilibria of aspergillic acid with iron(III) were studied potentiometrically and spectrophotometrically. Some structural features of ligand, prepared biosynthetically, are discussed on the basis of NMR results. Iron(III) coordination model is examined on the grounds of quantum chemical calculations and compared with those of two other cyclic hydroxamates.
Reaction of Na4[Rh2(l-CO3)4] with ethanimidamide hydrochloride leads to the [Rh2{lHN(HN@)CCH3}4L2]Cl complexes. DFT calculations and EPR spectra indicate that dRhRh is SOMO orbital. The rhodium atoms are equivalent in the [Rh2{l-HN(HN@)CCH3}4L2]+ compounds, and nonequivalent in [Rh2{lHN(HN@)CCH3}4LL0 ]+ complexes. The intense bands in the electronic spectra in the range 13 000–19 000 cm)1 are caused by transitions with prevailing d–d character.
A novel anionic diiminedioxime ligand containing two tetramethylfuranone moieties was prepared. A Cu(II)-bridged dimer was observed when the complex was prepared in ethanol. However, an acetone adduct of the ligand was observed when the complex was prepared in acetonitrile and acetone (figure). The Ni(II) complex is a square planar monomer.
C6
C5c
C5 C9
O5 C11 C4
C8
C3 N2
C12
C13
C20
C1
C2
N3
N1 C10 C7
C14 Cu1
C17 O4
N4 C15
O1 O2
C16
C19
C18 C21
viii
Benito Flores-Chávez, José G. Alvarado-Rodríguez, Noemí Andrade-López, Verónica García-Montalvo and Eliazar Aquino-Torres Polyhedron 28 (2009) 782
Contents
The synthesis of [{S(C6H3S)2O}GeRnHal2)n] compounds (R = Et, Ph; Hal = Cl, Br; n = 2–0) is described. The acidity of the GeRHal2+ fragment enhances a transannular OÆÆÆGe interaction, prompting a trigonal bipyramidal germanium local geometry; the GeR22+ less acid fragment present has an opposite effect.
Hypervalence in germanium compounds containing the tetracylic moiety {S(C6H3S)2O}Ge via OÆÆÆGe transannular interactions: A structural study
Mark A. Fox, J.A. Hugh MacBride, Richard J. Peace, William Clegg, Mark R.J. Elsegood and Kenneth Wade Polyhedron 28 (2009) 789
Improved syntheses of nitroso-carboranes and dicarboranylamines are described and crystal and structures of PhCB10H10CNO [(PhCB10H10C)2N]) reveal cage C…C distances of 1.68 and 1.99 Å, respectively.
Ph
C C
N New synthetic and structural studies on nitroso-ortho-carboranes RCB10H10CNO and bis(ortho-carboranyl)amines (RCB10H10C)2NH (R = Ph or Me)
Aurkie Ray, Georgina M. Rosair, Ramakant Kadam and Samiran Mitra Polyhedron 28 (2009) 796
Three new mono–di–trinuclear cobalt complexes of selectively and non-selectively condensed Schiff bases with N2O and N2O2 donor sets: Syntheses, structural variations, EPR and DNA binding studies
Muhammad Shahid, Muhammad Mazhar, Paul O Brien, Mohammad A. Malik and James Raftery Polyhedron 28 (2009) 807
Low temperature and single-source synthesis of a CuO–Ba2Cu3O5+x composite: Fabrication of thin films and characterization
C C
Three new mono–di–trinuclear cobalt complexes of three different Schiff bases have been synthesised. Of the three Schiff bases, HL1 and HL2 were obtained by selective condensation of two different 1,3-diamines with 2-hydroxyacetophenone and H2L3 resulted from the non-selective condensation of 1,3-diamine with 2-hydroxyacetophenone. The three complexes have been characterised using IR, UV–Vis spectroscopy and cyclic voltammetry. Structural aspects of the cobalt complexes have been described by performing single crystal X-ray analysis. EPR analysis and DNA binding abilities of the complexes have also been studied in detail.
The heterobimetallic complex Ba2(l-OAc)4(OAc)2Cu4(l-dmae)4(OH)2 (1), synthesized by the direct reaction of Ba(dmae)2 and Cu(OAc)2 Æ H2O in toluene, was characterized by melting point, CHNS, FT-IR, TGA, mass spectrometry and single crystal X-ray diffraction. Complex (1) was used at 400 C to deposit thin films of CuO–Ba2Cu3O5+x composite which were characterized by XRPD, SEM and EDX.
Ph
Contents
Debdulal Maity, Shouvik Chattopadhyay, Ashutosh Ghosh, Michael G.B. Drew and Gurucharan Mukhopadhyay Polyhedron 28 (2009) 812
Syntheses, characterization and X-ray crystal structures of Ni(II) complexes of tridentate monocondensed and tetradentate dicondensed Schiff bases
Joy Chakraborty, Santarupa Thakurta, Guillaume Pilet, Dominique Luneau and Samiran Mitra Polyhedron 28 (2009) 819
A novel tetra(l3-phenoxo) bridged copper(II) Schiff base complex containing a Cu4O4 cubane core: Synthesis, structural aspects and magneto-structural correlations
Eric Shyu and Robert L. LaDuca Polyhedron 28 (2009) 826
Divalent metal succinate/perchlorate coordination polymers incorporating a kinked hydrogenbonding capable diimine: Chains, layers and a (5,6)-connected binodal network featuring alternating rectangular and hexagonal grids
Manju Rajeswaran, Thomas N. Blanton, Ching W. Tang, William C. Lenhart, Steven C. Switalski, David J. Giesen, Brian J. Antalek, Thomas D. Pawlik, Denis Y. Kondakov, Nicholas Zumbulyadis and Ralph H. Young Polyhedron 28 (2009) 835
Structural, thermal, and spectral characterization of the different crystalline forms of Alq3, tris(quinolin-8-olato)aluminum(III), an electroluminescent material in OLED technology
The unsymmetrical tetradentate Schiff base ligands involving 1,2-diaminoethane or 1,2-diaminopropane with 2,4-pentanedione and diacetylmonoxime forms square planar complexes with Ni(II) whereas complexes of symmetrical ligands involving the same diamines and diacetylmonoxime cannot be prepared; instead the bis six-coordinate complex of the monocondensed tridentate Schiff bases were produced.
A novel tetranuclear copper(II) complex [Cu4L4] Æ Na Æ ClO4 has been synthesized exploiting the tetradentate donor set of a hydrazone ligand N0 -(2-hydroxy-3-methoxybenzylidene)H2L, benzohydrazide. The Cu4O4 core consists of a rare l3-phenoxo-bridged copper(II) atoms giving an approximately cubic array of alternating copper and oxygen atoms. Cryomagnetic susceptibility measurements over a wide range of temperature (2–300 K) demonstrate both ferro[J11 = +13.6(4) cm)1] and antiferromagnetic [J12 = )34.9(4) cm)1] interactions in a 2J model resulting in an overall antiferromagnetic behaviour of the magnetically coupled system.
Hydrothermal synthesis has afforded succinate (suc) or 2,2-dimethylsuccinate (dmsuc) perchlorate coordination polymers incorporating the hydrogen-bonding capable tethering ligand 4,40 -dipyridylamine (dpa). {[Co(suc)(Hdpa)2(H2O)2](ClO4)2 Æ 7.5H2O}n (1) manifests simple cationic 1D polymeric chains, while {[Cd3(suc)2.5(dpa)2](ClO4)}n (2) possesses a 3D binodal (5,6)-connected network. The network of 2 can be viewed as alternating (4,4) rectangular and (6,3) hexagonal grids being joined by pillaring ligands. The gem-dimethyl substituents within the dmsuc ligands promote a 2D (6,3) herringbone net in {[Cd2(dmsuc)2(dpa)(Hdpa)](ClO4) Æ 6H2O}n (3).
The interest in organic materials for use in organic light-emitting diodes (OLEDs) began with the pioneering report of efficient green electroluminescence from Alq3, by Tang VanSlyke. Alq3 is used in the electron transport and/or electron-injecting layer in OLED devices. In the present report, a combined structural, thermal, and spectroscopic analysis of different crystalline phases of Alq3 is presented.
ix
x
Gajendra Gupta, Glenn P.A. Yap, Bruno Therrien and Kollipara Mohan Rao Polyhedron 28 (2009) 844
Study of novel g5-cyclopentadienyl and g6arene platinum group metal complexes containing a N4-type ligand and their structural characterization
Diana Visinescu, Luminita M. Toma, Oscar Fabelo, Catalina Ruiz-Pérez, Francesc Lloret and Miguel Julve Polyhedron 28 (2009) 851
New 3d–4f supramolecular systems constructed by [Fe(bipy)(CN)4]) and partially blocked lanthanide cations
Alfonso Castiñeiras, Isabel García-Santos and José M. Varela Polyhedron 28 (2009) 860
A manganese(II) coordination polymer with a 3D porous structure: Synthesis, structure, and spectroscopic and magnetic behaviour
Contents
Reactions of platinum group metal complexes containing g5-and g6-cyclic hydrocarbons with a N4 donor ligand, viz. 3,5-bis(2-pyridyl)pyrazole (bpp-H), yielded mono- and dinuclear complexes. The molecular structures of [1]PF6, [5]PF6 and [8]BF4 have been established by single crystal X-ray diffraction studies
The two different 3D supramolecular arrangements in the 3d–4f isostructural series [Fe(bipy)(CN)4][Ln(bpym)(NO3)2(H2O)3] Æ H2O Æ CH3CN [Ln = Sm (1), Gd (2), Tb (3), Dy (4) and Ho (5)] (left) and [Fe(bipy)(CN)4][Ln(bpym)(NO3)2(H2O)4] [Ln = Pr (6), Nd (7), Sm (8) and Gd (9)] (right) are dictated by the lanthanide geometry (mono- or bicapped square antiprism) which is in turn influenced by the nature of the solvent used in the synthesis and the distinct ionic radii of the trivalent rare-earth ions.
A novel MnII coordination polymer with a porous 3D structure was prepared by the reaction between N,N0 -bis(carboxymethyl)dithiooxamide and manganese(II) perchlorate. Variable temperature magnetic measurements reveal the existence of very weak antiferromagnetic interactions through the carboxylate bridge.
Contents
Zhang-Peng Li, Yong-Heng Xing, Yun-Zhu Cao, Xiao-Qing Zeng, Mao-Fa Ge and Shu-Yun Niu Polyhedron 28 (2009) 865
Synthesis, structure and properties of a series of scorpionate oxovanadium(IV)–carboxylate complexes
The one-step reaction of VOSO4 Æ nH2O, pyrazole or 3,5-dimethylpyrazole, potassium poly(pyrazolyl)borate and carboxylic acids in methanol resulted in six new complexes, 1–6. The synthetic process described here is different from those in literature reports. Structural analyses show that in all of these complexes, the vanadium atoms are six-coordinated with a N4O2 donor set in a distorted-octahedral geometry, the carboxylate groups are coordinated as monodentate and the uncoordinated oxygen atom of the carboxylate groups form intra- or inter-molecular hydrogen bonds with the NH group of the corresponding coordinated neutral pyrazole (pzH/pzH*).
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