Polymetallic complexes (Part CIII): Tetrameric complexes of CoII, NiII, CuII,ZnII, CdII and HgII with octadentate azodye ligands, and their potential antibacterial activities

Twelve complexes of Co^II, Ni^II, Cu^II, Zn^II, Cd^II and Hg^II with two octadentate oxygen-nitrogen donor azodye ligands have been prepared. The complexes were characterized using analytical, conductance, magnetic susceptibility, IR, electronic spectra E.S.R., NMR, theromgravimetric and X-ray diffraction data. The Co^II and Ni^II complexes are found to be octahedral, Cu^II complexes are distorted octahedral and a tetrahedral stereochemistry has been attributed to Zn^II, Cd^II and Hg^II complexes. All the complexes are found to be tetrameric in nature. The antibacterial activities of the ligands and six other complexes with Escherichia coli

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, Staphylococcus aureus

and Proteus vulgaris

were investigated.

Keywords
Polymetallic complexes, Tetrameric complexes, Azodye complexes, Antibacterial activities