SCHIFF BASE COMPLEXES OF SOME GROUP IV METAL HALIDES

Abstract

Novel hexa-coordinated complexes of silicon(IV), titanium(IV), zirconium(IV) and tin(IV) chlorides of the general formula ML₂Cl₂ (where L = Schiff base prepared from the coupling reactions of glycine, leucine or cystine with O-hydroxyacetophenone), have been synthesized by refluxing the respective metal chloride and Schiff base in situ in an absolute ethanol and acetone mixture. The resulting complexes have been characterized by analytical data, spectroscopic (IR, UV, NMR) studies, melting points and conductance measurements. Chelate structures have been proposed for the complexes.

Key Words:

• Amino acids
• acetophenone
• IR
• UV
• NMR
• conductivity