SYNTHESIS AND CHARACTERIZATION OF AMINO-ACID SCHIFF-BASE COMPLEXES OFNICKEL(II)

A series of nickel(II) complexes of Schiff bases obtained by the conde nsation of 2-hydroxy-3-methylbenzaldehyde and 2,4-dihydroxybenzaldehyd e with glycine, DL-alanine, DL-valine, DL-methionine, L-leucine, and D L-phenylalanine were synthesized and characterized by elemental analys es, molar electrical conductivities, magnetic moments, infrared spectr a, and thermoanalyses. All the complexes were found to be non-electrol ytes with the general empirical formula [NiL(H2O)2], where L is an ami no acid Schiff base ligand. The probable structure of the complexes is suggested.