SYNTHESIS AND CHARACTERIZATION OF MANGANESE(III) COMPLEXES OF SCHIFF BASES DERIVED FROM AMINO ACIDS AND 2-HYDROXY-1-NAPHTHALDEHYDE

摘要

New complexes of Mn(III) with Schiff bases obtained by the condensation of 2-hydroxy-1-naphthaldehyde with glycine, L-alanine, L-phenylalanine, L-histidine, L-tryptophan and L-threonine have been synthesized and characterized by elemental analyses, UV, IR, magnetic susceptibility, thermo-gravimetry and non-aqueous titration. These complexes are coordinated through the ONO donor set derived from the carboxyl, imino and phenoxy groups of the ligands. Furthermore, the Schiff bases were obtained as solids and their structures were determined by IR, UV, ~1H NMR to compare with those of the complexes.