Synthesis, Characterization and Stability Constant study of New Schiff Bases Derived from 2-Amino -2-deoxy Chitosamine and aldehydes with Some Metal Complexes

Two new Schiff bases (S1,S2) derived from 2-Amino-2-deoxy chitosamine and mnitrobenzaldehyde (S1), and with salicylaldehyde (S2) were prepared and characterized using FTIR, UV and mass spectrometry. New complexes of the transition metal ions Co (II), Ni (II), Pd (II), Pt (II) with the two ligands were synthesized and their structures were elucidated depending on atomic absorption, FTIR, UV-visible spectra in addition to magnetic susceptibility and electrical conductivity measurement. Metal to ligand [M: L] ratio was obtained for all complexes in ethanol using molar ratio method, which gave comparable results with those obtained for the solid complexes. Stability constant of the complexes were determined using spectrophotometric method at 25oC and ionic strength was maintained constants using 0.1M KNO3.Stoichometry of the complexes by Job ,s method showed that metal : ligand ratio is 1:1.