SCHIFF-BASE COMPLEXES OF SOME GROUP-IV METAL-HALIDES

Novel hexa-coordinated complexes of silicon(IV), titanium(IV), zirconi um(IV) and tin(IV) chlorides of the general formula ML(2)Cl(2) (where L=Schiff base prepared from the coupling reactions of glycine, leucine or cystine with O-hydroxyacetophenone), have been synthesized by refl uxing the respective metal chloride and Schiff base in situ in an abso lute ethanol and acetone mixture. The resulting complexes have been ch aracterized by analytical data, spectroscopic (IR, UV, NMR) studies, m elting points and conductance measurements. Chelate structures have be en proposed for the complexes.