Contents Mehdi Amirnasr, Maryam Bagheri, Hossein Farrokhpour, Kurt Job Schenk, Kurt Mereiter and Peter C. Ford Polyhedron 71 (2014) 1 New Zn(II) complexes with N 2 S 2 Schiff base ligands. Experimental and theoretical studies of the role of Zn(II) in disulfide thiolate-exchange Two potentially tetradentate N 2 S 2 Schiff- base ligands L 1 and L 2 undergo reductive disulfide bond scission in alcoholic solution in the presence of zinc acetate during the course of Zn(NS) 2 complex formation. The X- ray crystal structures of [Zn(L 3 ) 2 ] and [Zn(L 4 ) 2 ], and theoretical calculations of the transition state of S–S cleavage are reported. Khodayar Gholivand, Foroogh Molaei, Maryam Rajabi, Mehdi D. Esrafili and Mahdieh Hosseini Polyhedron 71 (2014) 8 Synthesis, structural characterization and DFT calculations of a new one-dimensional diorga- notin(IV) derivative of N-isonicotinyl phosphor- amide A new 1D diorganotin coordination poly- mer, {SnCl 2 (CH 3 ) 2 L} n (1), L = N-isonicoti- nyl, N¢,N 00 -bis(a-methylbenzyl) phosphoric triamide, was synthesized and character- ized. DFT calculations were performed to compare the stability of the complex which showed trans–cis configuration with its all- trans isomer in the gas phase. AIM analysis confirmed the dominant electrostatic nat- ure of Sn–ligand interaction. Ang-Ran Li, Qian-Qian Guo, Li Li, Hong-Wei Hou and Yao-Ting Fan Polyhedron 71 (2014) 17 Synthesis, characterization and properties of four dimeric Zn II –BMP coordination polymers modulated by a series of aromatic polycarbox- ylate acid To systematically explore the influence of aromatic polycarboxylate ligands on build- ing Zn II –bmp (1,5-bis(2-methylbenzimida- zol) pentane) coordination polymers, four coordination polymers with various di- meric centers have been hydrothermally synthesized. Elsevier Ltd. Polyhedron 71, 20 March 2014 Contents lists available at ScienceDirect Polyhedron journal homepage: www.elsevier.com/locate/poly
Transcript
Contents
Mehdi Amirnasr, Maryam Bagheri,Hossein Farrokhpour, Kurt Job Schenk,Kurt Mereiter and Peter C. Ford
Polyhedron 71 (2014) 1
New Zn(II) complexes with N2S2 Schiff baseligands. Experimental and theoretical studies ofthe role of Zn(II) in disulfide thiolate-exchange
Two potentially tetradentate N2S2 Schiff-base ligands L1 and L2 undergo reductivedisulfide bond scission in alcoholic solutionin the presence of zinc acetate during thecourse of Zn(NS)2 complex formation. The X-ray crystal structures of [Zn(L3)2] and[Zn(L4)2], and theoretical calculations of thetransition state of S–S cleavage are reported.
Khodayar Gholivand, Foroogh Molaei,Maryam Rajabi, Mehdi D. Esrafili andMahdieh Hosseini
Polyhedron 71 (2014) 8
Synthesis, structural characterization and DFTcalculations of a new one-dimensional diorga-notin(IV) derivative of N-isonicotinyl phosphor-amide
A new 1D diorganotin coordination poly-mer, {SnCl2(CH3)2L}n (1), L = N-isonicoti-nyl, N¢,N00-bis(a-methylbenzyl) phosphorictriamide, was synthesized and character-ized. DFT calculations were performed tocompare the stability of the complex whichshowed trans–cis configuration with its all-trans isomer in the gas phase. AIM analysisconfirmed the dominant electrostatic nat-ure of Sn–ligand interaction.
Ang-Ran Li, Qian-Qian Guo, Li Li,Hong-Wei Hou and Yao-Ting Fan
Polyhedron 71 (2014) 17
Synthesis, characterization and properties offour dimeric ZnII–BMP coordination polymersmodulated by a series of aromatic polycarbox-ylate acid
To systematically explore the influence ofaromatic polycarboxylate ligands on build-ing ZnII–bmp (1,5-bis(2-methylbenzimida-zol) pentane) coordination polymers, fourcoordination polymers with various di-meric centers have been hydrothermallysynthesized.
Elsevier Ltd.
Polyhedron 71, 20 March 2014
Contents lists available at ScienceDirect
Polyhedron
journal homepage: www.elsevier .com/locate /poly
Yaroslav D. Boyko,Alexey Yu. Sukhorukov,Artem N. Semakin, Yulia V. Nelyubina,Ivan V. Ananyev, K.S. Rangappa andSema L. Ioffe
Polyhedron 71 (2014) 24
Synthesis, structure and dioxygen reactivity ofNi(II) complexes with mono-, bis-, tetra- andhexa-oxime ligands
Four new Ni(II) complexes with b-oximi-noalkylamines containing one (Ox1H1), two(Ox2H2), four (Ox4H4) and six (Ox6H6)oxime groups were synthesized and char-acterized. Oxidation of Ph3P with molecu-lar oxygen in presence of these complexeswas studied. Bis-oxime complexNi(Ox2H2)2Cl2 was found to be the mostactive oxidation promoter among the ob-tained nickel complexes.
Sushil K. Gupta, Neha Sen andRay J. Butcher
Polyhedron 71 (2014) 34
Synthesis, X-ray structure, electrochemical be-haviour and fluorescence studies of mononuc-lear dioxouranium complexes with oxygendonor ligands
The reaction of monomeric bidentate ligands [(2,6-PhCO)2(4-R)C6H2OH] (R = Me or t-Bu) with [UO2(-NO3)2Æ6H2O] gave uranyl complexes with distortedpentagonal bipyramidal geometry at the metalcentre. The U–Oeq bond lengths increase in the order:phenolic < solvent < carbonyl oxygen. The bidentateOO-donor mdbpH/bdbpH ligands are thus goodchelators for the UO2
2+ ion. The reduction potentialof 2 with a tert-butyl substituent on the phenolatering was shifted to a more negative potential thanthat of 1 with a methyl substituent, reflecting thestronger electron donating ability of the tert-butylgroup. The coordinated neopentanol in 1 is readilydisplaced by DMSO solution. Both complexes exhibitcharacteristic charge transfer emissions.
Ya-Qi Wang, Li-Min Han, Quan-Ling Suo,Ning Zhu and Fa-Wang Li
Polyhedron 71 (2014) 42
Synthesis and structural characterization ofnew multi-ferrocenyl pyridine derivatives
Four new multi-ferrocenyl pyridinederivatives were synthesized via[2 + 2 + 2] cycloaddition reaction usingFc–CBC–CBC–Fc and CH3CBN or PhCBNas reactants, CpCo(CO)2 as catalyst.
Structure and photochromism of zinc(II) com-plexes with 1-alkyl-2-(arylazo)imidazole, andthe effect of number of coordinated ligands andhalide type on the photochromism
[Zn(RaaiR/)(DMF)X2] and [Zn(RaaiR/)2X2] (Raa-iR/ = 1-alkyl-2-(arylazo)imidazole and X = Cl,Br, I) are structurally characterized and the UVlight irradiation in DMF solution of the com-plexes show trans-to-cis isomerisation of co-
ordinated azoimidazole. Quantum yields(/tfic) of free ligand are higher than theircomplexes. The cis-to-trans transformation is athermal process and the activation energy (Ea)of the complexes is lower than free ligands.The rate of isomerisation follows [Zn(RaaiR/)2
X2] < [Zn(RaaiR/)(DMF)X2] and [Zn(RaaiR/)n
Cl2] < [Zn(RaaiR/)nBr2] < [Zn(RaaiR/)nI2] (n = 1or 2). It may be related to rotor volume andmass; size and electronegativity of halidewhich increases the effective molar associa-tion in the order of I < Br < Cl. DFT and TD-DFTcomputations of representative complexes areused to explain the difference in the rates andquantum yields of photoisomerisation.
vContents
Mürsel Arıcı, Okan Zafer Yesilel,Onur Sahin and Murat Tas
Polyhedron 71 (2014) 62
Dinuclear and polynuclear copper(II) complexeswith 3,3¢-thiodipropionate and unprecedentedcoordination mode
In this study, three new thiodipropionatecomplexes were synthesized and charac-terized. The tdp ligand exhibits an unpre-cedented coordination mode. Complexes 1and 2 are 1D coordination polymers whilecomplex 3 is dinuclear structure. Complex3 displays irreversible thermochromism.
M. Chanski, A. Białonska, R. Jakubas andA. Piecha-Bisiorek
Polyhedron 71 (2014) 69
Structural characterization and properties of bis(1,4-H2-1,2,4-triazolium) pentachlorobis-muthate (III) and cocrystal of ammoniumchloride with tris (1,4-H2-1,2,4-triazolium) hex-achlorobismuthate (III)
A.A.M. Farag, Mohammed K. Obada andMohamed E. Mahmoud
Polyhedron 71 (2014) 75
Structural and optical evaluations of depositednanocrystalline NiO thin films via a Ni(II)–8-hydroxyquinolate complex by the static step-by-step soft surface reaction technique foroptoelectronic applications
Nanocrystalline NiO thin films weresynthesized by the static step-by-step softsurface reaction (SS-b-SSR) technique viathermal annealing of deposited thin filmsof Ni(II)-(8HQ)2 complex. Structural andoptical characteristics as well as the po-tential application as an optical sensor ofthe deposited nanocrystalline NiO wereconfirmed.
1.5 3.0 4.5
3.0
4.5
6.0ε1ε2
hνν (eV)
ε 1
0.4
0.6
0.8
1.0
1.2
1.4
ε 2
Particle size of nano-sized NiO
Photon energy dependence of dielectric constants ε1 and ε2 for nano-sized NiO
Structural characterization of cobalt(II)complexes of an N,O donor Schiff base and theiractivity on carcinoma cells
Two new octahedral cobalt(II) complexescontaining a potentially tridentate Schiffbase ligand were synthesized and charac-terized by spectral as well as thermalanalysis and single crystal X-ray diffracto-metry. The inhibitory effects of both com-plexes on the cell population growth ofdifferent human cells were also investi-gated by MTT assays.
Concentration ( M)0 5 10 25 50 100
Cel
l via
bilit
y (%
)
0
20
40
60
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100
12024 h 48 h
μ
*
* *
** *
*
**
*
Cell viability of A549 human lung carcinoma cells
vi Contents
Yanmei Chen, Qian Gao, Haifeng Zhang,Dandan Gao, Yahong Li, Wei Liu andWu Li
Polyhedron 71 (2014) 91
Five heterometallic SrII–MII (M = Co, Ni, Zn, Cu)3-D coordination polymers: Synthesis,structures and magnetic properties
Five heterometallic coordination polymerswith three varieties of 3-D frameworkstructures have been synthesized.Antiferromagnetic MIIÆÆÆMII interactionswere found for complexes 1 and 2.
Solomon W. Kelemu and Peter J. Steel
Polyhedron 71 (2014) 99
Silver(I) complexes of 1,3-diallylbenzimidazo-lin-2-one: A versatile ligand for discretebinuclear assemblies and a polymeric ladderand helix
1,3-Diallylbenzimidazolin-2-one reactswith silver salts to furnish discretebinuclear complexes or 1D coordinationpolymers depending on the counterion.Within each of the structures the ligandadopts a different coordination mode.
NN
O
AgBF4
Suman Mallick, Mrinal Kanti Ghosh,Rajat Saha and Swarup Chattopadhyay
Polyhedron 71 (2014) 104
Reactions of the dirhenium(III) complexRe2(l-O2CCH3)4Cl2 with triphenylguanidine:Dirhenium paddlewheel complex versus themononuclear quadruple bond cleavage product
The reaction of Re2(l-O2CCH3)4Cl2 (1) with1,2,3-triphenylguanidine (HTPG) affordsthe Re–Re multiply bonded cleavageproduct [H2TPG][ReO4] (2) and themixed l-acetate/l-guanidinate complex[Re2(l-TPG)3(l-O2CCH3)Cl]Cl (3), depend-ing upon the water content of the solventused in the reaction. Compounds 2 and 3have been characterized by elementalanalyses, IR, UV–Vis and 1H NMR spectro-scopies and by X-ray crystallography.
300 350 400 450 5000
200
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1000
CH3CNCH2Cl2
(CH3)2SOCH3OH
Fluo
resc
ence
Inte
nsity
(a.u
.)
Wavelength (nm)
Xiu-Li Wang, Jian Luan, Hong-Yan Lin,Guo-Cheng Liu and Mao Le
Polyhedron 71 (2014) 111
Four cobalt(II) coordination polymers based ona flexible N,N¢-bis(3-pyridinecarboxamide)-1,6-hexane ligand: Modulation of crystalarchitectures through the substituent groupsof isophthalates
Four cobalt(II) coordination polymersbased on the flexible bis-pyridyl-bis-amide(3-dpyh) ligand and four isophthalateswith different substituent groups havebeen hydrothermally synthesized. Thesubstituent groups of the isophthalatesplay important roles in tuning thestructures. The fluorescent, electrochemi-cal and photocatalytic properties ofcomplexes 1–4 have been studied.
viiContents
Xue-Jie Tan, Hai-Zhen Liu,Chong-Zhao Ye, Jian-Fang Lou, Yun Liu,Dian-Xiang Xing, Sen-Peng Li,Shu-Lian Liu and Lai-Zhou Song
Polyhedron 71 (2014) 119
Synthesis, characterization and in vitrocytotoxic properties of new silver(I) complexesof two novel Schiff bases derived from thiazoleand pyrazine
Two new Schiff bases derived from2-acetylthiazole and 2-acetylpyrazine aswell as their Ag(I) complexes have beensynthesized and characterized by variousphysico-chemical techniques, especially byS-XRD and P-XRD. Their antitumoractivities against cancer cell A549 indicatethat silver complexes display cytotoxicitysimilar to or better than that of cisplatin.
Alexandru Lupan and R. Bruce King
Polyhedron 71 (2014) 133
Pentalene as a ligand in hypoelectronicdiruthenaboranes and diosmaboranes withsurface metal–metal double bonding
The lowest energy PnM2Bn)2Hn)2 (Pn = g5,g5-C8H6; M = Ru, Os; n = 8–12) structuresare predicted by density functional theoryto have deltahedral structures with M@Mdistances of 2.5–2.7 Å and correspondingWBIs of 0.5–0.7 suggesting surfacemetal–metal double bonds.
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