Coordination Compounds with Biomimetic N2S2 Donor Ligands, II: Synthesis and Characterization of Group II-B Metal Complexes of Benzil Dithiosemicarbazone

Abstract

Complexes of benzil dithiosemicarbazone (BDTSC) with zinc (II), cadmium (II) and mercury (II) have been prepared and characterized on the basis of elemental analyses, conductivity and infrared spectral studies. IR spectral data suggest that BDTSC acts as dibasic quadridentate ligand in all complexes, the bonding sites being the two enolic sulphur and two azomethine nitrogen atoms to have M–N₂S₂ coordination core. Hence Zn-BDTSC may be regarded as structural model for the proposed active centre present in TF IIIA. Only Cd-BDTSC forms bipyridyl adduct.