Synthesis and Spectral Characterizations of Heterobinuclear Complexes of Copper(II) Schiff Base with Alkali Metals Salts

Abstract: During recent years coordination compounds of biologically active ligands ^[1,2] have receive much attention. Current interest in developing the chemistry of binuclear transition and alkali metal complexes draws inspiration from two disparate fields such as chemistry of materials and bioinorganic chemistry. Schiff base metal complexes deserve a proper attention because they show antibacterial^[3] and antifungal^[4] activities because of their specific structure. In the continuation of our earlier work^[5,6] we were prepared and characterized a number of binuclear alkali metal complexes of Cu(II) derived by the interaction of Schiff base of Cu(II)  with alkali metal salt of organic acids. These complexes were characterized on the basis of elemental analysis, IR and UV-Vis spectral data and magnetic measurement. The low values of conductivity measurement show the non-electrolytic nature of the complexes. In the IR spectra of metal complex ligand there was disappearance of very sharp absorption peak, indicate the deprotonation of phenolic proton on complex formation. The u_C-O (phenolic)have shifted towards higher energy side on complexation suggest the  bonding between the Cu(II) metal chelate and alkali metal which appear by dative bond via oxygen atoms of  C-O (phenolic). Electronic absorption bands have in dicated the ligand to metal charge transfer transition and also d-d transition. A magnetic measurement study of metals complex as ligand and their binuclear complexes have been showed the square planar geometry with coordination number four.