Cationic complexes of platinum and palladium with p-tolyl isocyanide

Cationic complexes of platinum and palladium of the type [MCl(p-CH3C6H4NC)L2]ClO4 (M = Pt, Pd; L = p-tolyl3P, o-tolyl3P, Cy3P, Ph2MeAs, Ph2EtAs, Ph2PrAs, Cy3As; Cy = cyclohexyl) have been isolated. These show a v(CN) band at ca. 2200 cm-1 compared with 2130 cm-1 for the free isocyanide ligand, suggesting weak π-character in the metal-carbon bond. The PMR spectra of the cationic complexes indicate trans configurations for the complexes. © 1977

Synthesis and spectral properties of the complexes of cobalt(II), nickel(II), copper(II), zinc(II), and cadmium(II) with 2-(thiomethyl-2′- benzimidazolyl)-benzimidazole

Synthesis of 2-(thiomethyl-2′-benzimidazolyl)benzimidazole (L) and its metal complexes of the formulae ML2(ClO4) 2·xH2O (M = Co, x = 3; M = Ni, Zn, or Cd, x = 2; M = Cu, x = 1) and MLBr2 (M = Co, Ni, Cu, Zn, or Cd) are described. They have been characterized by measuring physical properties, IR, NMR, and electronic spectral studies. The electronic spectral and magnetic moment data suggest an octahedral geometry for the cobalt(II) and nickel(II) perchlorate complexes, a tetrahedral geometry for the cobalt(II) and nickel(II) bromo complexes and a pseudo tetrahedral geometry for the copper(II) perchlorate and copper(II) bromide complexes. Based on elemental analyses, conductivity measurements and IR and NMR spectral studies, a six-coordinate geometry for cadmium perchlorate complex and various four-coordinate geometries for zinc perchlorate and bromo complexes of cadmium and zinc have been proposed

Complexes of the Schiff base derived from 4-​aminophenylbenzimidazole and 2,​5-​dehydropyrrolidine-​N-​aldehyde with Zn(II)​, Cd(II) and Hg(II) halides

A new Schiff base, dhpyr4apbi, was synthesized from 2-​(4-​aminophenyl)​benzimidazole and 2,​5-​dehydropyrrolidine-​N-​aldehyde and its complexes with Zn(II)​, Cd(II) and Hg(II) halides were prepd. Physicochem. properties of these metal complexes were studied using elemental anal., molar conductance, 1H NMR and IR measurements. The complexes are nonelectrolytes and are dimeric in nature with the empirical formula M2L2X4 (M = Zn, Cd, Hg; X = Cl, Br.)​. The min. energy configuration was obtained for these complexes using the mol. model Pro Plus. All the complexes were screened for their biol. activities. The Cd(II) and Hg(II) complexes show moderate antibacterial activity against Pseudomonas fluorescens

Complexes of N-(4-methoxy-benzilidene)-2-(4-aminophenyl) benzimidazole with Zn(II), Cd(H) and Hg(II) halides

The synthesis and characterization by elemental analysis, conductivity measurements, IR and proton NMR spectroscopy of complexes of the Schiff base derived from 2-(4-aminophenyl) benzimidazole and 4-methoxy benzaldehyde with Zn(II), Cd(II) and Hg(II) halides have been reported. Mercury halides yield complexes with the general formula Hg(POM4APBI)2X2; X = Cl, Br. Zinc and cadmium halides yield binuclear complexes with the general formula (POM4APBI)X2; M = Zn, X = Cl; M = Cd, X = Cl, Br. The complexes are all non-electrolytes and the ligand acts as a monodentate

Complexes of N-​(4-​methoxy-​benzylidene)​-​2-​(4-​aminophenyl)​benzimidazole with Zn(II)​, Cd(II) and Hg(II) halides. [Erratum to document cited in CA142:168268]

The Acknowledgement should read as follows: "The authors are thankful to Prof. V. K. Saxena, Head, Department of Chemistry, Dr. H. S. Gour University, Sagar for proving various authentic samples and laboratory facilities"

Studies on complexes of 2-(4-aminophenyl) benzimidazole with Zn(II), Cd(II) and Hg(II) salts

Complexes of 2-(4-aminophenyl) benzimidazole with Zn(II), Cd(II) and Hg(II) chlorides and Cd(II) and Hg(II) bromides have been synthesized. They have been characterized by elemental analysis, conductivity measurements, IR and 1H NMR spectral studies. The results show that the complexes are non-electrolytes, four coordinated and the ligand acts as a monodentate

Complexes of the Schiff base derived from 4-aminophenyl benzimidazole and 2, 2â²- dehydropyrollidene-N-aldehyde with Zn (II), Cd (II) and Hg (II) halides

A new Schiff base, dhpyr4apbi, has been synthesized from 4-aminophenyl benzimidazole and 2, 2â²- dehydropyrollidene-N-aldehyde and its complexes with Zn (II), Cd (II) and Hg (II) halides have been prepared. Physicochemical properties of these metal complexes have been investigated using elemental analysis, molar conductance, proton NMR and IR measurements. The complexes are non-electrolytes and are dimeric in nature with the empirical formula M 2L2X4 (M = Zn, Cd, Hg; X = Cl, Br.). The minimum energy configuration has been obtained for these complexes using the molecular model Pro Plus. All the complexes have been screened for their biological activities. The Cd(II) and Hg(II) complexes show moderate antibacterial activity against Pseudomonas fluorescens

Characterisation of a mixed N-heterocycle, 2-(N-methylimidazole-2'-yl- thiomethy)benzimidazole, and its complexes with nickel(II) and copper(II)

2-(N-methylimidazole-2'-yl-thiomethyl)benzimidazole (L) has been synthesised and the complexes ML2 (CI04) 2·2H2O (M = Ni or Cu) and MLX2nH 2O (M = Cu, X = Cl or Br, n = 0; M = Ni, X = Cl, n = 3; M = Ni, X = Br, n = 0) prepared and characterised. Proposed geometries for the complexes are: octahedral geometry for Perchlorate complexes; tetrahedral geometry for chloro-and bromo-complexes; dimeric square pyramidal for the chloro-complex of copper(II)

Zn(II), Cd(II) and Hg(II) complexes with 1-(p-methoxybenzyl)-2-(p- methoxyphenyl)benzimidazole: Syntheses, structures and luminescence

Five coordination compounds Zn(mbmpbi)2Cl2 (1), Zn(mbmpbi)2Br2 (2), Cd(mbmpbi)2Cl2 (3), Hg(mbmpbi)2Cl2 (4) and Hg(mbmpbi)2Br 2 (5) were synthesized by the reaction of 1-(p-methoxybenzyl)-2-(p- methoxyphenyl)benzimidazole (mbmpbi) with the corresponding metal halides. The complexes have been characterized by elemental analysis, conductance measurements, FT-IR, 1H NMR and photoluminescence spectral studies. The ligand mbmpbi exhibits the N-benzimidazole coordination. The structures of 3-5 have been determined by single crystal X-ray diffraction. These three complexes are isostructural, crystallizing in the monoclinic system, P2/n space group with a distorted tetrahedral geometry around the metal ion. Zn(II) and Cd(II) complexes show strong blue emission in solid state at room temperature. © 2011 Elsevier Ltd. All rights reserved