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Synthesis and Structural Studies on Some Transition metal complexes of Bis-(benzimidazole-2-thio) ethane, propane and butane ligands

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Author Affiliations

  • 1Department of Chemistry, College of Science, University of Mosul, Mosul, IRAQ

Res.J.chem.sci., Volume 2, Issue (6), Pages 43-49, June,18 (2012)

Abstract

Transition metal complexes of Co(II),Ni(II),Cu(II) and Zn(II) with the tetradentate ligands [L1= 1,2-bis-(benzimidazole-2-thio) ethane, L2=1,3-bis-(benzimidazole-2-thio) propane, L3=1, 4-bis-(benzimidazole-2-thio)butane], derived from the condensation of 2-mercaptobenzimidazole and 1,2-dibromoethane or 1, 3-dibromo propane or 1, 4-dibromobutane were synthesized. Characterization has been done on the basis of analytical conductance, magnetic data, infrared, electronic spectra , metal content analysis and 1HNMR data for the ligands. From analytical data the stoichiometry of the complexes has been found to be (1:1) (metal: ligand). IR spectra data suggest that the ligands behave as bidentate with N,N or S,S or S,S,N,N donor sequence toward the metal ions. On the basis of the above spectral, physicochemal, data as well as magnetic moment measurements tetrahedral and square planner geometries were assigned for the complexes.

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