SYNTHETIC AND PHYSICOCHEMICAL STUDIES OF POLYMERIC HOMOTRIMETALLIC COMPLEXES INVOLVING [(8-HYDROXY-5-QUINOLYL)IMINO]MERCAPTOACETIC ACID

Coordination polymers of [(8-hydroxy-5-quinolyl)imino]mercaptoacetic a cid have been prepared with the metal ions, Cu2+, Ni2+, Co2+, Cd2+, an d Hg2+. The polymeric complexes have been characterized by elemental a nalyses, TGA, molar conductance as well as electronic and IR spectral measurements. It was found that the ligand behaves as a triprotic tetr adentate one. The coordination takes place through the oxygen and nitr ogen atoms of the quinolinol moiety as well as through the mercapto an d carboxyl groups of the mercaptoacetic acid. The analytical data depi ct the formation of complex compounds with the stoichiometry 3:2 (meta l:ligand). Tetrahedral stereochemical configuration is suggested for t hese polymeric complexes.