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Synthesis, characterization and antimicrobial activity studies of some transitionmetal complexes derived from3-chloro-N-(lE)-[2-hydroxyquinoline-3-yl]methylene-1-benzo(b)thiophene carbohydrazide

N.Adheerkumar, B.H.M.Mruthyunjayaswamy

A series of new coordination complexes of CuII, CoII, NiII, ZnII, CdII, and HgII with the Schiff base 3-chloro-N-(1E)-(2-hydroxy quinoline-3-yl]methylene)- 1-benzo(b)thiophene-2-carbohydrazide have been synthesized and characterized by elemental analysis, electrical conductivitymeasurements, IRspectra, electronic spectra, ESRspectra,magnetic susceptibility, TGAandmass spectral data. The Schiff base behaves as tridentate ONO donor ligand and forms the complexes of the type ML stoichiometry.All the complexes are colored and non electrolytes. It is found that CuII, CoII, NiII, ZnII, CdII, and HgII complexes have exhibited octahedral geometry. The ligand and its metal complexes have been screened for their antibacterial activity against E. coli, S. aureus and antifungal activity against, A. niger and C. albicans.