Contents Hamid Golchoubian, Sara Koohzad, Maedeh Ramzani and Davood Farmanzadeh Polyhedron 51 (2013) 1 Synthesis of copper (II) complexes incorporating N,N-dimethyl-N 0 -benzylethylenediamine and NCX (X = O, S and Se) ligands: A combined crystallographic, spectroscopic and DFT study Mononuclear copper (II) pseudohalide (NCO, NCS and NCSe) complexes were synthesized. The X-ray showed structure around the copper in [Cu(L) 2 (NCO)]ClO 4 is square pyr- amidal. DFT calculations show that the Cu– NCX complexes are more stable than their linkage isomers Cu–XCN. The complexes are soluble in organic solvents and demon- strated positive solvatochromism. The solva- tochromic behaviors of the complexes are based on the DN value of the solvent. Irina Kiseleva, Dmitrii Pyreu, Tatyana Krivonogikh, Maria Bazanova, Tatyana Hochenkova and Eugenii Kozlovskii Polyhedron 51 (2013) 10 Thermodynamic study of mixed-ligand com- plex formation of copper(II) and nickel(II) nitrilotriacetates with amino acids in solution. I The mixed ligand complex formation of copper(II) and nickel(II) nitrilotriacetates with basic amino acids (L = His, Orn, Lys, Im) has been investigated by means of pH- potentiometry, calorimetry and spectro- photometry. The received data evidences various coordination modes of the amino acids in the mixed complexes. The forma- tion of stable mixed complexes of metal complexonates with amino acids at phy- siological pH value should be accounted for during chelation therapy. 4 6 8 10 12 0 20 40 60 80 100 N O O O O O O Cu N NH O NH2 O Cu N O O O O O O O NH2 O NH N OH2 Cu N O O O O O O N NH O- NH3 O + α, % pH Cu 2+ CuHNta CuNtaHHis - CuNtaHis 2- CuNta - (CuNta) 2 His 3- CuNtaOH 2- CuHHis 2+ CuHHis 2 + CuHis 2 CuNta 2 4- Cui-Cui Zhao, Zhong-Gao Zhou, Xiang Xu, Li-Jie Dong, Guo-Hai Xu and Zi-Yi Du Polyhedron 51 (2013) 18 Isomerism of a series of octahedrally coordi- nated transition metal carboxylate–phosphi- nates with 1,10-phenanthroline as a coligand: Discrete dimers or double-chains constructed by various dimeric ring motifs Six octahedrally coordinated transition metal carboxylate–phosphinates featuring various discrete dimers or 1D double- chains are presented here, and the related supramolecular isomerism amongst them is discussed. Elsevier Ltd. Polyhedron 51, 4 March 2013 Contents lists available at SciVerse ScienceDirect Polyhedron journal homepage: www.elsevier.com/locate/poly
Transcript
Contents
Hamid Golchoubian, Sara Koohzad,Maedeh Ramzani andDavood Farmanzadeh
Polyhedron 51 (2013) 1
Synthesis of copper (II) complexes incorporatingN,N-dimethyl-N0-benzylethylenediamine andNCX (X = O, S and Se) ligands: A combinedcrystallographic, spectroscopic and DFT study
Mononuclear copper (II) pseudohalide (NCO,NCS and NCSe) complexes were synthesized.The X-ray showed structure around thecopper in [Cu(L)2(NCO)]ClO4 is square pyr-amidal. DFT calculations show that the Cu–NCX complexes are more stable than theirlinkage isomers Cu–XCN. The complexes aresoluble in organic solvents and demon-strated positive solvatochromism. The solva-tochromic behaviors of the complexes arebased on the DN value of the solvent.
Irina Kiseleva, Dmitrii Pyreu,Tatyana Krivonogikh, Maria Bazanova,Tatyana Hochenkova andEugenii Kozlovskii
Polyhedron 51 (2013) 10
Thermodynamic study of mixed-ligand com-plex formation of copper(II) and nickel(II)nitrilotriacetates with amino acids in solution. I
The mixed ligand complex formation ofcopper(II) and nickel(II) nitrilotriacetateswith basic amino acids (L = His, Orn, Lys,Im) has been investigated by means of pH-potentiometry, calorimetry and spectro-photometry. The received data evidencesvarious coordination modes of the aminoacids in the mixed complexes. The forma-tion of stable mixed complexes of metalcomplexonates with amino acids at phy-siological pH value should be accounted forduring chelation therapy.
4 6 8 10 120
20
40
60
80
100
N
OO
O
O
O
O
CuN
NH
O
NH2
O
Cu
N
OO
O
O
O
O
O
NH2
O
NH
N
OH2
Cu
N
OO
O
O
O
O
N
NH
O-
NH3
O
+
α, %
pH
Cu2+
CuHNta
CuNtaHHis-
CuNtaHis2-
CuNta-
(CuNta)2His3- CuNtaOH2-
CuHHis2+ CuHHis2+ CuHis2 CuNta2
4-
Cui-Cui Zhao, Zhong-Gao Zhou, Xiang Xu,Li-Jie Dong, Guo-Hai Xu and Zi-Yi Du
Polyhedron 51 (2013) 18
Isomerism of a series of octahedrally coordi-nated transition metal carboxylate–phosphi-nates with 1,10-phenanthroline as a coligand:Discrete dimers or double-chains constructedby various dimeric ring motifs
Six octahedrally coordinated transitionmetal carboxylate–phosphinates featuringvarious discrete dimers or 1D double-chains are presented here, and the relatedsupramolecular isomerism amongst themis discussed.
Elsevier Ltd.
Polyhedron 51, 4 March 2013
Contents lists available at SciVerse ScienceDirect
Polyhedron
journal homepage: www.elsevier .com/locate /poly
Suman Roy, Tapan Kumar Mondal,Partha Mitra and Chittaranjan Sinha
Polyhedron 51 (2013) 27
Copper(I)/silver(I)-phosphine-N-{(2-pyridyl)-methyliden}-6-coumarin complexes: Syntheses,structures, redox interconversion, photophysi-cal properties and DFT computation
N-[(2-Pyridyl)methyliden]-6-coumarin com-plexes of Cu(I) and Ag(I) in the presence ofdiphosphines (dppm, dppe) as auxiliary li-gands are described. The structures are sup-ported by an X-ray crystallographic study. Thecomplexes are emissive. Electrochemistryshows a Cu(II)/Cu(I) redox couple along withligand reduction, while Ag(0) deposition isobserved for the Ag(I) complexes. Coulo-metric oxidation of the Cu(I) complexes hasseparated the Cu(II) complexes and has beensupported by EPR spectra. DFT and TD-DFTcalculations are used to interpret the spectraand redox properties.
Uwe Siegert, Theunis J. Muller andJannie C. Swarts
Polyhedron 51 (2013) 41
Synthesis and electrochemical properties offerrocene-containing N-allylcarbamates: Struc-ture of CH2@CHCH2–NHCOO–CH2Fc
Ferrocene-containing N-allylcarbamatesFc–(CH2)m–OOCHN–CH2CH@CH2 withm = 1, 2, 3 or 4 have been synthesised,studied electrochemically and the singlecrystal structure of the m = 1 derivativehas been solved.
Activation of ortho C–H bond by nickel(II)acetate or sodium tetrachloropalladate(II) innaphthyl imino derivatives of azobenzene
Orthometallated Ni(II) and Pd (II) com-plexes incorporating azosalen ligands havebeen synthesized and characterized. Thedinegative ligands bind the metal ions intetradentate (C, N, N, O) fashion. Structureswere confirmed by X-ray study. Oxygeninsertion into the M–C bond using mCPBAor hydrogen peroxide has been examined.Luminescence properties of ligands andcomplexes have been studied and com-pared.
Gholamhossein Grivani, Vida Tahmasebi,Aliakbar Dehno Khalaji, Karla Fejfarováand Michal Dušek
Polyhedron 51 (2013) 54
Synthesis, characterization and crystal structuredetermination of a new vanadium(IV) Schiffbase complex (VOL2) and investigation of itscatalytic activity in the epoxidation of cyclooc-tene
A new vanadium(IV) Schiff base complex,VIVOL2, was prepared and characterized byelemental analysis (CHN), FT-IR spectro-scopy and single crystal X-ray analysis. Thecatalytic activity of the complex VIVOL2
was investigated in the epoxidation ofcyclooctene. The reaction conditions wereoptimized and the results showed that thecomplex VIVOL2 as a homogeneous catalystwas highly active and selective under theseconditions in the epoxidation of cyclooc-tene.
O
TBHP/CHCl3VOL2
VOL2
O
OH
OMe
L2VIVO L2V
VO L2VV
OH
O
(CH3)3COOH
OOC(CH3)3
(CH3)3COOH
vContents
Krzysztof Oberda, Irena Deperasinska,Yakov Nizhnik and Anna Szemik-Hojniak
Polyhedron 51 (2013) 61
A novel complex of zinc tetraphenylporphyrinwith two dioxane molecules in a rare attach-ment. Crystal structure, spectroscopy and the-oretical calculations
The ZnTPP–(Dioxane)2 complex representsa unique structure, with two dioxanemolecules in the ‘‘chair’’ conformation,placed in equatorial and axial positionrelative to ZnTPP core.
Laure Monnereau, David Sémeril,Dominique Matt and Loïc Toupet
Polyhedron 51 (2013) 70
Tetra-hydroxy-calix[4]arene derivatives withtwo P(III) or P(V) units attached at the upperrim
The distally-substituted calixarenes 5,17-p-{P(X)Ph2}2-calix[4]arene-(OH)4 (X = O, S,nil) have been synthesised from O-pro-tected precursors. As revealed by an X-raydiffraction study, the diphosphorylatedderivative adopts a polymeric zig-zagstructure in the solid state, in which thephosphoryl groups are hydrogen-bondedto hydroxyl groups of neighbouring calix-arene units.
Bigyan Ranjan Jali, Kazi Masud andJubaraj B. Baruah
Polyhedron 51 (2013) 75
Selectivity in changes of fluorescence emissionof 1,4-naphthoquinone derivatives by manga-nese and cadmium ions
The fluorescence emission of 2-(pyridine-2-yl-methyl amino)naphthalene-1,4-dione(1) is guided by various metal ions.2-(Pyridine-n-yl-methylamino)naphthalene-1,4-dione (n = 3,4) are not specific influorescence response towards metal ions.The 2-(pyridine-2-yl)ethylamino)naphtha-lene-1,4-dione (4) shows unique responsetowards cadmium ions, where a threestages in emission process with concen-tration of Cd2+ namely OFF–ON–ON isobserved.
ON
NH
O
nR
Increase in Cd2+
concentration
Fluorescence OFF-ON-ON
when n = 2
Increase in Mn2+
concentration
When n = 1Fluorescence
ON-OFF
hν
Musa Özil and Mutlu Canpolat
Polyhedron 51 (2013) 82
Solvent-free synthesis of novel phthalocyaninescontaining triazole derivatives under micro-wave irradiation
A fast and effective procedure was devel-oped for the synthesis of bulky substitutedmetal-free phthalocyanines and metal-lophthalocyanines. The present proceduredescribed in this paper demonstrated thatmicrowave processing combined with sol-vent-free condition leads to shorter reac-tion time, higher yield, a clean reactionproduct and easier work-up than classicalthermal processing.
Synthesis, properties and extended MS studiesof a new heterometallic [Mn4Ni2]-core oxime-bridged complex
Synthesis, properties and extended MSstudies of a new heterometallic [Mn4Ni2]-core oxime-bridged complex are reportedwith X-ray diffraction crystal structureanalysis supported by extended MS spec-trometry studies.
Saptarshi Biswas, Carmen Diaz andAshutosh Ghosh
Polyhedron 51 (2013) 96
The first triple phenoxido-bridged triangularNiIICuII
2 complexes with a N2O2 donor di-Schiffbase and pseudohalide (N(CN)2
) or NCS))ligands: Structural analyses and magnetic prop-erties
Two unusual triangular triple phenoxido-bridged NiCu2 complexes with pseudoha-lide ligands (N(CN)2
) or NCS) as coordinat-ing anions) show the presence of moderateantiferromagnetic exchange interactionsmediated through the double phenoxidobridges.
J.G. Małecki, I. Gryca and M. Penkala
Polyhedron 51 (2013) 102
Aryldiazenido ruthenium(II) complexes. Struc-ture and characterization of p-tolyldiazenidoruthenium(II) complexes with pyrazole andimidazole ligands
The p-tolyldiazenido ruthenium(II) complexes[RuCl3(PPh3)2(N2PhCH3)]ÆCH3OH (1), [RuCl3-(PPh3)(N2PhCH3)(HPz)] (2) and [RuCl3(PPh3)-(N2PhCH3)(Im)]ÆCH3OH (3) were synthesizedand characterized by IR, 1H, 13C, 31P NMR,electronic absorption and emission spectroscopy,
and X-ray crystallography. In the molecularstructure of complex (1) some p–p stackinginteractions are observed, whereas in the struc-ture of the imidazole complex (3) graph setanalysis shows intermolecular hydrogen bondedrings. The electronic structures of the complexeswere calculated by DFT based on their crystalstructures. The spin-allowed singlet–singlet elec-tronic transitions of the complexes were calcu-lated by time-dependent DFT and the UV–Visspectra have been discussed on this basis. Theemission properties of the complexes were alsostudied.
Maciej Dranka, Leszek Niedzicki,Marta Kasprzyk, Marek Marcinek,Władysław Wieczorek andJanusz Zachara
Polyhedron 51 (2013) 111
An insight into coordination ability of dicyanoi-midazolato anions toward lithium in presenceof acetonitrile. Crystal structures of novellithium battery electrolyte salts
Novel generation of imidazole-derivedsalts was characterized by single-crystalX-ray diffraction experiments. Comprehen-sive crystal structure analysis providesvaluable information about properties andcoordination ability of substituted 4,5-dicyanoimidazolato anions.
viiContents
Hassan Keypour, Nasibeh Rahpeyma,Majid Rezaeivala, Parisa Arzhangi,Mehdi Bayat, Laura Valencia,Yalcin Elerman and Orhan Büyükgüngör
Polyhedron 51 (2013) 117
Synthesis and structural characterization of anew Schiff base macrocyclic ligand containing apiperazine head unit and its metal complexes.Crystal structure of the Co(II) complex
A new macrocyclic Schiff base ligand, L, wassynthesized by the condensation reaction of1,4-bis(2-formylphenyl)piperazine and 1,4-
diaminobutane in acetonitrile. The Schiff baseligand was characterized by elemental ana-lyses, IR, and mass spectroscopy. Three newCo(II), Cu(II) and Zn(II) complexes, [CoL(NO3)]-ClO4, [CuL(NO3)]ClO4 and [ZnL(NO3)]ClO4,were prepared and characterized by elementalanalysis, IR, FAB-MS and conductivity mea-surements, and in the case of [ZnL(NO3)]ClO4
by 1H NMR spectroscopy. The X-ray crystalstructure of [CoL(NO3)]ClO4 showed that thecomplex contains Co(II) in a distorted octahe-dral geometry with an N4O2 core. Also,theoretical studies on interaction of the nitrateion and metal ions were carried out.
Saber-Mustapha Zendaoui andBachir Zouchoune
Polyhedron 51 (2013) 123
Molecular properties and electronic structure ofphenazine ligand in binuclear molybdenum andmanganese metal complexes: A density func-tional theory study
The coordination mode and the electroniccommunication between the metal centersof the studied binuclear complexes dependon the attached ligands. The C–C and C–Nbond distances in the coordinated ring areelongated, indicative of p-back donationfrom the metal fragments to the phenazinep*-MOs, inducing a loss of its aromaticity.
Ren-Tai Zhuang, Wan-Jung Lin,Rui Rui Zhuang and Wen-Shu Hwang
Polyhedron 51 (2013) 132
Hg(II), Ag(I) and Au(I) complexes with aniline orpyridine-functionalized N-heterocyclic carbene
The crystal structures of [Hg(La)2MeOH](PF6)2, [Hg(Lc)2](PF6)2 and Au(La)Cl (La/Lb isaniline/pyridine N-functionalized imida-zol-2-ylidene) are determined. The –NH2
group of aniline in [Hg(La)2MeOH](PF6)2
and Au(La)Cl, and the PF6 anions in[Hg(La)2MeOH](PF6)2 and [Hg(Lc)2](PF6)2
play important roles in stabilizing thecrystal structure through intramolecularand intermolecular hydrogen bonding in-teractions.
Çigdem Yagcı and Ahmet Bilgin
Polyhedron 51 (2013) 142
Synthesis, characterization, aggregation, fluor-escence, electrical and thermal properties ofnovel octasubstituted metal-free and metal-lophthalocyanines
The novel metal-free phthalocyanine (4)and its metal complexes (5)–(8), bearingoctakis(3-hydroxypropylmercapto) substi-tuents, have been prepared and character-ized. Complexation of compound (5) withAg+ or Pd2+ also was investigated. Theelectrical conductivities, thermal, aggrega-tion and fluorescence properties of thephthalocyanines were also examined.
Nickel(II) complexes with 2-(pyridin-3-yl-methylsulfanyl)phenylamine and halide/pseu-dohalides: Synthesis, structural characteri-sation, interaction with CT-DNA and bovineserum albumin, and antibacterial activity
On reaction of 2-(pyridin-3-ylmethylsulfanyl)phenyla-mine (L) with nickel(II) salt, a new series ofhexacoordinated nickel(II) complexes of 2-(pyridin-
(3) and NCS) (4)] was isolated and characterised byspectroscopic and electrochemical techniques alongwith the detailed structural characterisation ofcomplex 1 by single crystal X-ray diffraction. Thespectroscopic study of interaction of 1 with CT-DNAshowed the groove binding mode of complex 1 and itis also in accordance with the unchanged values ofthe viscosity of the DNA solution upon addition ofcomplex 1. The formation of a ground state BSA–[Ni(L)4Cl2] complex has been explored with the helpof spectroscopic tools. All four nickel(II) complexeshave higher antibacterial activity than ligand Lagainst five pathogenic bacteria (Escherichia coli,Vibrio cholerae, Streptococcus pneumonia, Shigella sp.and Bacillus cereus).
N
S NH2
Ni(OAc)2, 4H2OL
MeOH, RefluxMixture
[Ni(L)4Cl2]NiCl2, 6H2O
MeOH, Reflux 1
NaCl
NaNCO
NaSCN NaN3 / Stir
[Ni(L)4(NCO)2]
[Ni(L)4(N3)2][Ni(L)4(SCN)2]
4 3
2Stir
Stir
Stir
Jeanet Conradie
Polyhedron 51 (2013) 164
A DFT study of the reactivity of b-diketonato-1,5-cyclo-octadieneiridium(I) complexes
Relationships between kinetic rate con-stants, electronic parameters and DFTcalculated orbital energies and charges of[Ir(b-diketonato)(cod)] complexes.
Coordination of P(X)-modified (X = O, S) N-aryl-carbamoylmethylphosphine oxides and sulfideswith Pd(II) and Re(I) ions: Facile formation of6,6-membered pincer complexes featuring atro-pisomerism
P(X)-modified (X = O, S) CMPO(S) readilyyield j3-ONO, SNO, and SNS Re(I) and Pd(II)pincer complexes with two fused six-membered metallocycles, forming in solu-tion at room temperature stable atropi-somers.
P
N
OPPh2
Y
X
Ph Ph
PdCl
P
NH
OPPh2
Y
X
Ph PhP
N
OPPh2
Y
X
Ph Ph
Re(CO)3
X, Y = O, S
J. Manzur, H. Mora, V. Paredes-García,A. Vega and M.A. Novak
Polyhedron 51 (2013) 180
Effect of the counter-anion on the structuraland magnetic properties of a copper(II) complexwith 2-[(bis(2-pyridylmethyl)amino)methyl]-4-methyl-6-(methylthio)phenol
A new 2-[(bis(2-pyridylmethyl)amino)-methyl]-4-methyl-6-(methylthio)phenolcopperII perchlorate, complex, [Cu2(l-SL)2](ClO4)2 (1), was synthesized and mag-netically and structurally characterized.The properties of the new complex arediscussed in comparison to the reportedhexafluorophosphate complex with thesame ligand, in terms of the effect of thedistortion resulting from the use of adifferent anion.
Synthesis, characterization, and DNA-binding ofenantiomers of iron(II) Schiff base complexes
Two pairs of iron(II) chiral enantiomersfac-D-[Fe(S-L1)3][ClO4]2 and fac-K-[Fe(R-L1)3][ClO4]2 (D-1 and K-1), fac-D-[Fe(S-L2)3][ClO4]2 and fac-K-[Fe(R-L2)3]
[ClO4]2 (D-2 and K-2), were synthesizedand characterized. The X-ray structuralanalyses of K-1 and D-2 revealed that theiron(II) complexes possess octahedral co-ordination geometry for N6 donor atomsby three bidentate ligands. R-L1 ligandinduces the fac-K isomer, while S-L2 ligandinduces the fac-D isomer. The enantiose-lective binding constants of iron(II) chiralenantiomers to calf-thymus DNA (ct-DNA)range from 0.91 · 105 to 1.43 · 105 M)1.Moreover, the D enantiomers exhibitedmore efficient DNA interaction with re-spect to the K enantiomers.
Tannistha Roy Barman, Manas Sutradhar,Michael G.B. Drew and Eva Rentschler
Polyhedron 51 (2013) 192
2-Amino-2-methyl-1,3-propanediol (ampdH2)as ligand backbone for the synthesis of cobaltcomplexes: Mononuclear Co(II), binuclearCo(II,III) and hexanuclear Co(II,III)
Three cobalt complexes have beensynthesized and structurally characterizedusing 2-amino-2-methyl-1,3-propanediol(ampdH2) and its Schiff base derivativeligands. Depending on the donor propertiesof the coordinated donor atoms of theligand three complexes are found verydifferent and consist of mononuclear Co(II),mixed-valence binuclear Co(II,III) andmixed-valence hexanuclear Co(II,III) com-plexes respectively.
Niko Fischer, Li Gao, Thomas M. Klapötkeand Jörg Stierstorfer
Polyhedron 51 (2013) 201
Energetic salts of 5,50-bis(tetrazole-2-oxide) in acomparison to 5,50-bis(tetrazole-1-oxide) deri-vatives
New and easy available 5,50-bis(2-hydro-xytetrazole) (2BTO) is a perfect reagent forthe synthesis of new ionic energetic mate-rials which can be used as ingredients forfuture explosive or propellant composi-tions.
Novel Pd(II) coordination compounds involving2-[(2-hydroxyphenyl)methylene]hydrazine-N-(2-propenyl)-carbothioamide as a ligand or pro-ligand: Synthesis, crystal structures and analy-tical application
Novel palladium(II) complexes with athiourea derivative have been synthesizedand characterized. An analytical procedurefor selective extraction of Pd2+ from aqu-eous solutions has been developed.
Formation of a Cu(II)–phenoxyl radical complexfrom a Cu(II)–phenolate complex: A new modelfor galactose oxidase
A new N3O type tetradentate ligand (HL) [2,4-di-tert-butyl-6-((4-(2-(6,8-di-tert-butyl-2H-benzo[e][1,3]oxazin-3(4H)-yl)ethyl)piperazin-1-yl)methl)-phenol] and its complex [CuL(CH3-OH)]ClO4
(CH3OH) have been synthesised. The complexhas been crystallographically and spectroscopi-
cally characterised. It has been noticed that in thepresence of acetonitrile the Cu(II) centers in thecomplex undergo reduction with a concomitantoxidation of the ligand. EPR and UV–Vis spectro-scopic studies of the complex in acetonitrileindicate that this disproportionation proceedsvia the formation of a Cu(II)–phenoxyl inter-mediate. The Cu(II)–phenoxyl complex is foundto be stable in methanol in the presence of base.The oxidised products of the ligand are isolatedand characterized. The paramagnetic centers inthe Cu(II)–phenoxyl complexes were found to beweakly ferromagnetically coupled.
Synthesis, structure, interaction with DNA andcytotoxicity of a luminescent copper(II) com-plex with a hydrazone ligand
A luminescent copper(II) complex [CuII(L)-H2O]2SO4, 1a was synthesized with theacyclic tridentate 2-hydroxy naphthalde-hyde-2-pyridylhydrazone ligand, HL, 1. Themolecular structure of 1a has been deter-mined by single crystal X-ray diffractionstudies. The DNA interaction studies of 1ahave been investigated by various techni-ques. The complex 1a exhibits cytotoxicitytowards HeLa cells with LD50 4.97 lM.
Valentina Ol’shevskaya,Anton Makarenkov, Elena Kononova,Pavel Petrovskii, Mikhail Grigorievand Valery Kalinin
Polyhedron 51 (2013) 235
Use of carborane carboxylic acids in the synth-esis of boronated nitrogen heterocycles
The synthesis of novel nitrogen-containingheterocyclic compounds with o- and m-carborane clusters was developed startingfrom the available carborane carboxylicacids.
Attia S. Attia, Ayman A. Abdel Aziz,Khalifa A. Alfallous and M.F. El-Shahat
Polyhedron 51 (2013) 243
New diethoxo-bridged dinuclear Cr(III) com-plexes with derivatives of the quinoxaline-2,3-dione ligand and 2,20-bipyridine as a co-ligand:Syntheses, spectral characterizations, magneticproperties, antimicrobial inhibitory activitiesand interpretation of the electronic absorptionspectra using the ZINDO/S-CI semi-empiricalmethod
Two new di-l-ethoxodinuclearCr(III) com-plexes of 6,7-dichloroquinoxaline-2,3-dione (DCQX) and 6,7-dimethylquinoxa-line-2,3-dione (DMQX) have been synthe-sized and characterized. The effect of thestructural changes of the ligands on thespectroscopic, magnetic and antimicrobialbehaviors has been studied. The ZINDO/S-CI method was used to interpret theobserved electronic transitions of the twocomplexes.
xiContents
Darko P. Ašanin, Marija D. Zivkovic,Snezana Rajkovic, Beata War _zajtis,Urszula Rychlewska and Miloš I. Djuran
Polyhedron 51 (2013) 255
Crystallographic evidence of anion� � �p interac-tions in the pyrazine bridged {[Pt(en)Cl]2
(l-pz)}Cl2 complex and a comparative studyof the catalytic ability of mononuclear andbinuclear platinum(II) complexes in the hydro-lysis of N-acetylated LL-methionylglycine
This work deals with the X-ray character-ization of the pyrazine-bridged binuclear{[Pt(en)Cl]2(l-pz)}Cl2 complex and a spec-troscopic study of the catalytic ability ofthe [Pt(en)(H2O)2]2+ and {[Pt(en)(H2O)]2
(l-pz)}4+complexes in the hydrolysis ofN-acetylated LL-methionylglycine dipeptide.
The paper concerns two modifications of8-hydroxyquinoline framework, 5,7-dichloro-2-[2-(2-chlorophenyl)vinyl]qui-noline-8-ol (HL1) and 2-[2-(3,4-dichloro-phenyl)vinyl] quinoline-8-ol (HL2) and
their interaction with [ReOX3(PPh3)2](X = Cl, Br). The purity and structures ofHL1 and HL2 were determined by means ofHPLC, NMR and mass spectroscopy. Theoxorhenium(V) complexes [ReOCl2(L1)-(PPh3)]2ÆMeCN (1), [ReOBr2(L1)(PPh3)] (2),[ReOCl2(L2)(PPh3)] (3) and [ReOBr2(L2)-(PPh3)] (4) were characterized spectrosco-pically and structurally. The experimentalstudies on compounds 1 and 3 wereaccompanied by DFT calculations. Addi-tional information about binding betweenthe rhenium atom and oxo ligand in thecomplexes was obtained by NBO analysis.
Re
OX PPh3
Ph3P XX
NOH
Cl
Cl
ClN
OHCl
Cl
X = Cl, Br
1:1MeCN
Re
OPh3P X
N XO
Re
OPh3P X
N XO
cis-X,X-[ReOX2(N-O)(PPh3)]
Poulami Pattanayak, Jahar Lal Pratihar,Debprasad Patra, Chia-Her Lin,Sobhana Paul and Kausiki Chakraborty
Polyhedron 51 (2013) 275
Synthesis, characterization, structure, redoxproperty, antibacterial and catalytic activity oftridentate Schiff base cobalt(III), nickel(II) andpalladium(II) complexes
Complex [(L)2Co]NO3, [(L)2Ni] and [(L)PdCl]were synthesized and characterized byusual spectroscopy. The redox property ofthe complexes was examined and correlatewith DFT results. The new [(L)PdCl] com-plex have been used as catalysts for Heckcoupling reactions in ambient condition.The complex [Co(L)2]NO3 exhibited anti-bacterial activity.
N
SOM
N S
ON
S
O
Pd
Cl
M = Co, Ni
Shi-Yuan Zhang, Na Xu, Wei Shi,Peng Cheng and Dai-Zheng Liao
Polyhedron 51 (2013) 283
Syntheses, structural diversities and magneticproperties of four new Co(II) coordinationpolymers with phthalic acid derivatives
Four 3D Co(II) coordination polymers withphthalic acid derivatives as ligands havebeen synthesized and characterized bysingle crystal X-ray diffraction, PXRD andmagnetic susceptibility measurements.Analyses of the temperature dependenceof the magnetic susceptibilities revealantiferromagnetic interactions betweenthe l1,3 carboxylate groups bridging theCo(II) ions in these four complexes.
xii Contents
Edjane R. dos Santos, Melina A. Mondeli,Lucas V. Pozzi, Rodrigo S. Corrêa,Heloisa S. Salistre-de-Araújo,Fernando R. Pavan, Clarice Q.F. Leite,Javier Ellena, Valéria R.S. Malta,Sérgio P. Machado and Alzir A. Batista
Polyhedron 51 (2013) 292
New ruthenium(II)/phosphines/diimines com-plexes: Promising antitumor (human breastcancer) and Mycobacterium tuberculosis fightingagents
New ruthenium(II)/phosphine/diiminescomplexes with general formula cis-[RuCl2(PP)(N–N)] with promising antitu-mour (human breast cancer) and Mycobac-terium tuberculosis fighting agents weresynthesized and characterized. The struc-ture of the complexes were determined byX-ray diffraction.
N
Ru
Cl
P N
ClP
P-P = 1,4-bis(diphenylphosphino)butane
or 1,3-bis(diphenylphosphino)propane;
N-N = 5,5´-dimetyl-2,2´dipyridyl or
4,4´-dimethyl-2,2´dipyridyl
Yenny Ávila-Torres,Horacio López-Sandoval, Edgar Mijangos,Liliana Quintanar, Esau E. Rodríguez,Angelina Flores-Parra,Rosalinda Contreras, Ramón Vicente,Geert L.J.A. Rikken andNorah Barba-Behrens
Polyhedron 51 (2013) 298
Structure and magnetic properties of copper(II)and cobalt(II) coordination compounds derivedfrom optically active tridentate ligands
Trinuclear cobalt(II) and copper(II) com-plexes of deprotonated chiral aminoalco-
hols were synthesized. The copper(II)trinuclear [Cu3(R,R())cpse)3(H2O)3]Æ8H2O(5) consists of three Cu2+ atoms in adistorted square pyramidal geometry,linked by bridging oxygen atoms to forman equilateral triangular array. It presentsan antiferromagnetic coupling and a mag-netic super-exchange pathway. The iso-structural trinuclear [Co3(S,S(+)cpse)3
(H2O)3]Æ7H2O (6) complex behaves as asuper-paramagnetic compound. The heli-coidal polymeric {K2[Cu2(S,S(+)cpse)2-(SCN)2} (7) compound presents a weakferromagnetic behavior.
Diana-Carolina Ilies, Elena Pahontu,Sergiu Shova, Aurelian Gulea andTudor Rosu
Polyhedron 51 (2013) 307
Synthesis, characterization and crystal struc-tures of nickel(II), palladium(II) and copper(II)complexes with 2-furaldehyde-4-phenylthiose-micarbazone
2-Furaldehyde-4-phenylthiosemicarbazone(HL) and its nickel(II), palladium(II) andcopper(II) complexes were synthesizedand characterized. The ligand has beencharacterized by elemental analyses, IR,electronic, 1H NMR and 13C NMR spectro-scopy.In addition, the structures of the ligand,nickel(II) and palladium(II) complexes havebeen determined by single-crystal X-raydiffraction.
Different coordination environments of iron(III)and pseudopolymorphism in complexes withdipicolinic acid and 2-amino-6-picoline. Theinfluence of molar ratio and solvent type
Two Fe(III) complexes, (Hamp-6-pic)[Fe(dipic)2][Fe(dipic)(NO3)(H2O)2]Æ2H2O (1) and
(Hamp-6-pic)[Fe(dipic)2]ÆH2O (2) (Hamp-6-pic+ = 2-amino-6-picolinium), with dif-ferent coordination environments of theFe(III) ions, were prepared by varying theligand-to-metal molar ratio, and {(Hamp-6-pic)[Fe(dipic)2]}2ÆH2O (3) was obtainedby recrystallization of 2 in a mixture ofmethanol and ethanol. All the compoundswere characterized by spectroscopic (IRand UV–Vis) methods and elemental ana-lysis, whilst their crystal structures wererevealed by X-ray structural analysis.
xiiiContents
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