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

Abstract

Twelve complexes of Co II, Ni II, Cu II, ZnII, Cd II and Hg IIwith two octadentate oxygen–nitrogen donor azodye ligandshave been prepared. The complexes were characterized using analytical, conductance, magnetic susceptibility, IR, electronicspectra E.S.R., NMR, theromgravimetric and X-ray diffraction data. The Co and NiII complexes are found to be octahedral, CuII complexes are distorted octahedral and a tetrahedral stereochemistry has been attributed to ZnII, CdII and HgII complexes. All the complexes are found to be tetrameric in nature. The antibacterial activities of the ligands and six other complexes withEscherichia coli, Staphylococcus aureus and Proteus vulgaris were investigated.