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prelims, contents pages
Polyhedron 24, issue 8, 2 June 2005 www.elsevier.com/locate/poly
Contents Papers Mohan S. Bharara, Chong H. Kim, Sean Parkin, David A. Atwood Polyhedron 24 (2005) 865 Synthesis and X-ray crystal structures of dinuclear hydrogen-bonded cadmium and lead 2-aminoethanethiolates
Md. Iqbal Hyder, G.M. Golzar Hossain, Shariff E. Kabir, Md. Arzu Miah Polyhedron 24 (2005) 872 Triruthenium clusters bearing bridging dppm and capping sulfido ligands: X-ray structures of [Ru3(CO)6(l3-CO)(l3-S)(PPh3)(l-dppm)] and [Ru3(CO)6(l3-S)2(PPh3)(l-dppm)]
Inamur R. Laskar, Shih-Feng Hsu, Teng-Ming Chen Polyhedron 24 (2005) 881 Highly efficient orange-emitting OLEDs based on phosphorescent platinum(II) complexes
Elsevier Ltd.
An in-depth study of dinuclear Cd and Pbcysteamine complexes has been carried out using NMR, IR, mass spectrometry and X-ray crystallography. The intermolecular hydrogen-bonding involving nitrogen, sulfur and counter anion has not been reported for similar dinuclear complexes, except for [Hg(aet)2]Cl2, previously reported by us. The structures described here should contribute to the understanding of fundamental Cd and Pb-thiolate chemistry of simple as well as complex molecules such as metallothioneins.
Treatment of [Ru3(CO)10(l-dppm)] (1) with PPh3S at ambient temperature gave [Ru3(CO)7(l3-CO)(l3-S)(l-dppm)] (2) and [Ru3(CO)6(l3-CO)(l3-S)(PPh3)(l-dppm)] (3). The reaction of [Ru3(CO)7(l3-S)2(l-dppm)] (4) with PPh3 in the presence of Me3NO afforded 3, [Ru3(CO)6(l3-S)2(PPh3)(l-dppm)] (5) and [(l-H)2Ru3(CO)7(l3-S)(l-dppm)] (6). A similar reaction of [Ru3(CO)7(l3-S)(l3-Se)(l-dppm)] (7) with PPh3 afforded [Ru3- (CO)6(l3-S)(l3-Se)(PPh3)(l-dppm)] (8). Protonation of 4 and 7 with CF3COOH gave [(l-H)Ru3(CO)7(l3-S)2-(l-dppm)] (10) and [(l-H)Ru3-(CO)7(l3-Se)(l3-S)(l-dppm)]+ (11), respectively, isolated as their PF6 salts.
The syntheses, characterisations, photophysical properties and their applications in organic light emitting devices of a series of 2-phenylbenzothiazolato (bt)/substituted 2-phenylbenzothiazolato (X-bt) platinum(II) based square-planar complexes [(X-bt)Pt(acac); acac = acetylacetonate; X = unsubstituted, F, OMe and CF3] are reported.
iv
Rajeev C. Chikate, Avadhoot R. Belapure, Subhash B. Padhye, Douglas X. West Polyhedron 24 (2005) 889 Transition metal quinone–thiosemicarbazone complexes 1: Evaluation of EPR covalency parameters and redox properties of pseudo-square-planar copper(II)– naphthoquinone thiosemicarbazones
P. Kamatchi, S. Selvaraj, M. Kandaswamy Polyhedron 24 (2005) 900 Synthesis, magnetic and electrochemical studies of binuclear copper(II) complexes derived from unsymmetrical polydentate ligands
Synthesis, EPR and biological activities of bis(1-n-butylamidino-O-alkylurea)copper(II)chloride complexes: EPR evidence for binuclear complexes in frozen DMF solution
Volodimir D. Vreshch, Andrey B. Lysenko, Alexander N. Chernega, Joachim Sieler, Konstantin V. Domasevitch Polyhedron 24 (2005) 917 Heterobimetallic Cd(Zn)/Be coordination polymers involving pyridyl functionalized beryllium diketonates
New binuclear copper(II) complexes were prepared using penta and hexadentate ligands and characterized by various spectral studies. Electrochemical and magnetic studies of these complexes were carried out.
The EPR spectra of copper(II) complexes of the type [Cu(1-BunAAUH)2]Cl2, where 1-BunAAUH = 1-n-butylamidino-O-alkylurea, in frozen solutions of DMF showed a signal at g ca. 2. In addition to this, a signal at half the resonance field having a well resolved sevenline hyperfine structure was observed, which have been interpreted as arising from DMs = ±1 and DMs = ±2 transitions. The complexes show growth inhibitory activity against pathogenic fungi and bacteria.
Two-step complexation of pyridyl functionalized diketonate ligands allows preparation of a number of heterobimetallic coordination polymers with alternation of Be and Cd(Zn) metal ions.
D g
=
Polyhedron 24 (2005) 909
EPR studies on pseudo-square-planar copper(II) complexes of naphthoquinone– thiosemicarbazones of the formula [CuLCl] reveal appreciable covalency in the metal– ligand bonding as a consequence of extensive delocalization, while cyclic voltammetric response of these complexes suggests metalcentered redox behavior. There exists a linear relationship between the degree of tetrahedral distortion f(a) with EPR and redox parameters.
=
O. Ibopishak Singh, M. Damayanti, N. Rajen Singh, R.K. Hemakumar Singh, Manoj Mohapatra, R.M. Kadam
Contents
g ⊥ D⊥
g⊥(monomer)
Contents
Jianping Guo, Wai-Kwok Wong, Wai-Yeung Wong Polyhedron 24 (2005) 927 Synthesis and structural characterization of some arylamidinium diphenylphosphinates: Formation of one-, two- and three-dimensional networks by charge-assisted hydrogen bonds
v
The preparation, characterization and crystal structures of a series of arylamidinium diphenylphosphinates are described and these ionic salts exist as polymeric networks of various dimensions assembled via chargeassisted hydrogen bonds.
H N H Ar
C
4,40 -Bipyridine and bis(4-pyridyl)propane as bridging ligands in the supramolecular assembly of silver(I) polyhedra containing embedded acetylenediide
Bernadette S. Creaven, Denise A. Egan, Kevin Kavanagh, Malachy McCann, Mary Mahon, Andy Noble, Bhumika Thati, Maureen Walsh Polyhedron 24 (2005) 949 Synthesis and antimicrobial activity of copper(II) and silver(I) complexes of hydroxynitrocoumarins: X-ray crystal structures of [Cu(hnc)2(H2O)2] Æ 2H2O and [Ag(hnc)] (hncH = 4-hydroxy-3-nitro-2H-chromen-2one)
Manuel A. Fernandes, Marcus Layh, Bernard Omondi Polyhedron 24 (2005) 958 Synthesis and crystal structures of sterically hindered lithium-1-azaallyls and a diazahexatriene
Ph P Ph n
H N H
+
Polyhedron 24 (2005) 940
O − O
Ar = phenyl, p-tolyl, 4-, 3-, 2-pyridyl H H N C
C
H N H
Xiao-Li Zhao, Thomas C.W. Mak
+ N H H
+ N H H
O − O
Ph P Ph n
Six new double salts of silver(I) acetylenediide, namely [Ag13(C2)2(CF3CO2)9(bipy)4(H2O)3] (1), [Ag18(C2)2(C2F5CO2)18(bipyH)4] Æ 3H2O (2), [Ag6(C2)(CF3CO2)4(bpp)] (3), [Ag6(C2)(C2F5CO2)5(bppH)]n (4), [Ag6(C2)(CF3CO2)5(bppH)]n (5) and [Ag23(C2)4(CF3CO2)15(bpp)6] Æ H2O (6) (bipy = bpp = bis(4-pyridyl)pro4,40 -bipyridine, pane), have been shown to exhibit a variety of discrete and higher-dimensional supramolecular architectures.
A series of silver complexes of coumarinbased ligands showed significant anti-microbial activity, particularly against the clinically important methicillin-resistant Staphylococcus aureus (MRSA) bacterium and also demonstrated good activity, comparable to that of the commercial fungicides clortrimazole and ketoconazole, against a clinical isolate of the fungal pathogen Candida albicans.
The lithium-1-azaallyl complexes [LiN(Ar)C(R)CHR0 (D)] 1 and the diazahexatriene 2 were obtained in moderate yields from LiCHR2 or LiCH(R)Ph(tmen) and ArNC [Ar ¼ C6 H3 ðPri 2 -2; 6Þ or C6 H3 ðBut 2 -2; 5Þ]. All compounds were characterized by NMR spectroscopy and single crystal X-ray crystallography. 1b–1d were found to be monomeric in the solid state with 1b adopting an unusual anti-conformation.
R CHR' ArN Li(D)
1b; R' = R = SiMe3, Ar = C6H3(Pri2-2,6), D = (thf)2; 1c; R = SiMe3, R' = Ph, Ar = C6H3(Pri2-2,6), D = tmen; 1d; R = SiMe3, R' = Ph, Ar = C6H3(But2-2,5), D = tmen.
R NAr
H
2; ArN
H R
R = SiMe3, Ar = C6H3(Pri2-2,6)
vi
Jack Harrowfield, Jee Young Kim, Yang Kim, Young Hoon Lee, Sujandi, Pierre Thue´ry Polyhedron 24 (2005) 968
Contents
Coordination of Cu(II) to a podand hexamine enables fcile synthesis of stereoisomeric macrocycles with pendent arms suitable for chelation of an external metal ion outside the macrocycle.
Podand hexamines and the synthesis of pendent-arm tetra-azamacrocycles
Neil F. Curtis, Ward T. Robinson Polyhedron 24 (2005) 976 Compounds of some alkylamido-substituted cyclic tetraamines with copper(II): The structure of di(perchlorato)RRSS(trans-(6,13-bis(ethylamido)-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane)copper(II)
The amino substituents of (trans-6,13-diamino-6,13-dimethyl-1, 4, 8,11-tetraazacyclotetradecane)copper(II) are acylated by reaction with acetic or propionic anhy-drides to form the 6,13-bismethylamido or bis(ethylamido) substituted cations. Centrosymmetrical di(perchlorato-trans-6,13-bisethylamido-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane)copper(II) has copper(II) in square-planar coordination by the endocyclic nitrogen atoms with perchlorate oxygen atoms weakly coordinated axially.
O
Et
HN
Me
H
H N
O O Cl O O
N
N
N H
H Me
NH Et
Stefania Tanase, Gerard A. van Albada, Rene´ de Gelder, Elisabeth Bouwman, Jan Reedijk Polyhedron 24 (2005) 979 Crystal structure, magnetic properties and spectroscopic characterization of a rare syn– anti acetato-bridged zig-zag chain copper(II) complex
A novel linear-chain copper(II) compound containing syn–anti acetato bridges is presented. The compound exhibits a very weak ferromagnetic interaction between the Cu(II) ions with a J value of 0.21 cm)1.
O O Cl O O
Cu
O
Contents
The Publisher encourages the submission of articles in electronic form thus saving time and avoiding rekeying errors. For detailed instructions on the preparation of manuscripts and of electronic artwork, consult the Author Gateway for Elsevier at http://authors.elsevier.com
Full text of this journal is available, on-line from ScienceDirect. Visit www.sciencedirect.com for more information.
vii
Contents Papers Mohan S. Bharara, Chong H. Kim, Sean Parkin, David A. Atwood Polyhedron 24 (2005) 865 Synthesis and X-ray crystal structures of dinuclear hydrogen-bonded cadmium and lead 2-aminoethanethiolates
Md. Iqbal Hyder, G.M. Golzar Hossain, Shariff E. Kabir, Md. Arzu Miah Polyhedron 24 (2005) 872 Triruthenium clusters bearing bridging dppm and capping sulfido ligands: X-ray structures of [Ru3(CO)6(l3-CO)(l3-S)(PPh3)(l-dppm)] and [Ru3(CO)6(l3-S)2(PPh3)(l-dppm)]
Inamur R. Laskar, Shih-Feng Hsu, Teng-Ming Chen Polyhedron 24 (2005) 881 Highly efficient orange-emitting OLEDs based on phosphorescent platinum(II) complexes
Elsevier Ltd.
An in-depth study of dinuclear Cd and Pbcysteamine complexes has been carried out using NMR, IR, mass spectrometry and X-ray crystallography. The intermolecular hydrogen-bonding involving nitrogen, sulfur and counter anion has not been reported for similar dinuclear complexes, except for [Hg(aet)2]Cl2, previously reported by us. The structures described here should contribute to the understanding of fundamental Cd and Pb-thiolate chemistry of simple as well as complex molecules such as metallothioneins.
Treatment of [Ru3(CO)10(l-dppm)] (1) with PPh3S at ambient temperature gave [Ru3(CO)7(l3-CO)(l3-S)(l-dppm)] (2) and [Ru3(CO)6(l3-CO)(l3-S)(PPh3)(l-dppm)] (3). The reaction of [Ru3(CO)7(l3-S)2(l-dppm)] (4) with PPh3 in the presence of Me3NO afforded 3, [Ru3(CO)6(l3-S)2(PPh3)(l-dppm)] (5) and [(l-H)2Ru3(CO)7(l3-S)(l-dppm)] (6). A similar reaction of [Ru3(CO)7(l3-S)(l3-Se)(l-dppm)] (7) with PPh3 afforded [Ru3- (CO)6(l3-S)(l3-Se)(PPh3)(l-dppm)] (8). Protonation of 4 and 7 with CF3COOH gave [(l-H)Ru3(CO)7(l3-S)2-(l-dppm)] (10) and [(l-H)Ru3-(CO)7(l3-Se)(l3-S)(l-dppm)]+ (11), respectively, isolated as their PF6 salts.
The syntheses, characterisations, photophysical properties and their applications in organic light emitting devices of a series of 2-phenylbenzothiazolato (bt)/substituted 2-phenylbenzothiazolato (X-bt) platinum(II) based square-planar complexes [(X-bt)Pt(acac); acac = acetylacetonate; X = unsubstituted, F, OMe and CF3] are reported.
iv
Rajeev C. Chikate, Avadhoot R. Belapure, Subhash B. Padhye, Douglas X. West Polyhedron 24 (2005) 889 Transition metal quinone–thiosemicarbazone complexes 1: Evaluation of EPR covalency parameters and redox properties of pseudo-square-planar copper(II)– naphthoquinone thiosemicarbazones
P. Kamatchi, S. Selvaraj, M. Kandaswamy Polyhedron 24 (2005) 900 Synthesis, magnetic and electrochemical studies of binuclear copper(II) complexes derived from unsymmetrical polydentate ligands
Synthesis, EPR and biological activities of bis(1-n-butylamidino-O-alkylurea)copper(II)chloride complexes: EPR evidence for binuclear complexes in frozen DMF solution
Volodimir D. Vreshch, Andrey B. Lysenko, Alexander N. Chernega, Joachim Sieler, Konstantin V. Domasevitch Polyhedron 24 (2005) 917 Heterobimetallic Cd(Zn)/Be coordination polymers involving pyridyl functionalized beryllium diketonates
New binuclear copper(II) complexes were prepared using penta and hexadentate ligands and characterized by various spectral studies. Electrochemical and magnetic studies of these complexes were carried out.
The EPR spectra of copper(II) complexes of the type [Cu(1-BunAAUH)2]Cl2, where 1-BunAAUH = 1-n-butylamidino-O-alkylurea, in frozen solutions of DMF showed a signal at g ca. 2. In addition to this, a signal at half the resonance field having a well resolved sevenline hyperfine structure was observed, which have been interpreted as arising from DMs = ±1 and DMs = ±2 transitions. The complexes show growth inhibitory activity against pathogenic fungi and bacteria.
Two-step complexation of pyridyl functionalized diketonate ligands allows preparation of a number of heterobimetallic coordination polymers with alternation of Be and Cd(Zn) metal ions.
D g
=
Polyhedron 24 (2005) 909
EPR studies on pseudo-square-planar copper(II) complexes of naphthoquinone– thiosemicarbazones of the formula [CuLCl] reveal appreciable covalency in the metal– ligand bonding as a consequence of extensive delocalization, while cyclic voltammetric response of these complexes suggests metalcentered redox behavior. There exists a linear relationship between the degree of tetrahedral distortion f(a) with EPR and redox parameters.
=
O. Ibopishak Singh, M. Damayanti, N. Rajen Singh, R.K. Hemakumar Singh, Manoj Mohapatra, R.M. Kadam
Contents
g ⊥ D⊥
g⊥(monomer)
Contents
Jianping Guo, Wai-Kwok Wong, Wai-Yeung Wong Polyhedron 24 (2005) 927 Synthesis and structural characterization of some arylamidinium diphenylphosphinates: Formation of one-, two- and three-dimensional networks by charge-assisted hydrogen bonds
v
The preparation, characterization and crystal structures of a series of arylamidinium diphenylphosphinates are described and these ionic salts exist as polymeric networks of various dimensions assembled via chargeassisted hydrogen bonds.
H N H Ar
C
4,40 -Bipyridine and bis(4-pyridyl)propane as bridging ligands in the supramolecular assembly of silver(I) polyhedra containing embedded acetylenediide
Bernadette S. Creaven, Denise A. Egan, Kevin Kavanagh, Malachy McCann, Mary Mahon, Andy Noble, Bhumika Thati, Maureen Walsh Polyhedron 24 (2005) 949 Synthesis and antimicrobial activity of copper(II) and silver(I) complexes of hydroxynitrocoumarins: X-ray crystal structures of [Cu(hnc)2(H2O)2] Æ 2H2O and [Ag(hnc)] (hncH = 4-hydroxy-3-nitro-2H-chromen-2one)
Manuel A. Fernandes, Marcus Layh, Bernard Omondi Polyhedron 24 (2005) 958 Synthesis and crystal structures of sterically hindered lithium-1-azaallyls and a diazahexatriene
Ph P Ph n
H N H
+
Polyhedron 24 (2005) 940
O − O
Ar = phenyl, p-tolyl, 4-, 3-, 2-pyridyl H H N C
C
H N H
Xiao-Li Zhao, Thomas C.W. Mak
+ N H H
+ N H H
O − O
Ph P Ph n
Six new double salts of silver(I) acetylenediide, namely [Ag13(C2)2(CF3CO2)9(bipy)4(H2O)3] (1), [Ag18(C2)2(C2F5CO2)18(bipyH)4] Æ 3H2O (2), [Ag6(C2)(CF3CO2)4(bpp)] (3), [Ag6(C2)(C2F5CO2)5(bppH)]n (4), [Ag6(C2)(CF3CO2)5(bppH)]n (5) and [Ag23(C2)4(CF3CO2)15(bpp)6] Æ H2O (6) (bipy = bpp = bis(4-pyridyl)pro4,40 -bipyridine, pane), have been shown to exhibit a variety of discrete and higher-dimensional supramolecular architectures.
A series of silver complexes of coumarinbased ligands showed significant anti-microbial activity, particularly against the clinically important methicillin-resistant Staphylococcus aureus (MRSA) bacterium and also demonstrated good activity, comparable to that of the commercial fungicides clortrimazole and ketoconazole, against a clinical isolate of the fungal pathogen Candida albicans.
The lithium-1-azaallyl complexes [LiN(Ar)C(R)CHR0 (D)] 1 and the diazahexatriene 2 were obtained in moderate yields from LiCHR2 or LiCH(R)Ph(tmen) and ArNC [Ar ¼ C6 H3 ðPri 2 -2; 6Þ or C6 H3 ðBut 2 -2; 5Þ]. All compounds were characterized by NMR spectroscopy and single crystal X-ray crystallography. 1b–1d were found to be monomeric in the solid state with 1b adopting an unusual anti-conformation.
R CHR' ArN Li(D)
1b; R' = R = SiMe3, Ar = C6H3(Pri2-2,6), D = (thf)2; 1c; R = SiMe3, R' = Ph, Ar = C6H3(Pri2-2,6), D = tmen; 1d; R = SiMe3, R' = Ph, Ar = C6H3(But2-2,5), D = tmen.
R NAr
H
2; ArN
H R
R = SiMe3, Ar = C6H3(Pri2-2,6)
vi
Jack Harrowfield, Jee Young Kim, Yang Kim, Young Hoon Lee, Sujandi, Pierre Thue´ry Polyhedron 24 (2005) 968
Contents
Coordination of Cu(II) to a podand hexamine enables fcile synthesis of stereoisomeric macrocycles with pendent arms suitable for chelation of an external metal ion outside the macrocycle.
Podand hexamines and the synthesis of pendent-arm tetra-azamacrocycles
Neil F. Curtis, Ward T. Robinson Polyhedron 24 (2005) 976 Compounds of some alkylamido-substituted cyclic tetraamines with copper(II): The structure of di(perchlorato)RRSS(trans-(6,13-bis(ethylamido)-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane)copper(II)
The amino substituents of (trans-6,13-diamino-6,13-dimethyl-1, 4, 8,11-tetraazacyclotetradecane)copper(II) are acylated by reaction with acetic or propionic anhy-drides to form the 6,13-bismethylamido or bis(ethylamido) substituted cations. Centrosymmetrical di(perchlorato-trans-6,13-bisethylamido-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane)copper(II) has copper(II) in square-planar coordination by the endocyclic nitrogen atoms with perchlorate oxygen atoms weakly coordinated axially.
O
Et
HN
Me
H
H N
O O Cl O O
N
N
N H
H Me
NH Et
Stefania Tanase, Gerard A. van Albada, Rene´ de Gelder, Elisabeth Bouwman, Jan Reedijk Polyhedron 24 (2005) 979 Crystal structure, magnetic properties and spectroscopic characterization of a rare syn– anti acetato-bridged zig-zag chain copper(II) complex
A novel linear-chain copper(II) compound containing syn–anti acetato bridges is presented. The compound exhibits a very weak ferromagnetic interaction between the Cu(II) ions with a J value of 0.21 cm)1.
O O Cl O O
Cu
O
Contents
The Publisher encourages the submission of articles in electronic form thus saving time and avoiding rekeying errors. For detailed instructions on the preparation of manuscripts and of electronic artwork, consult the Author Gateway for Elsevier at http://authors.elsevier.com
Full text of this journal is available, on-line from ScienceDirect. Visit www.sciencedirect.com for more information.
vii