Polarographic study of the composition and stability constants of cadmium (II) complexes with new Schiff bases

Abstract

The synthesis and characterisation of ortho hydroxy acetophenone tris (hydroxymethyl) methylamine (OHAPT) and resacetophenone tris (hydroxymethyI) methylamine (RPT) are described for the first time. The metal to ligand ratio in these complexes is found to be 1:2 in the mixed solvent (30% aqueous DMF) used. Stability constants of these complexes are PI = 1.0 X 108 ; 4.0 X lOs and fil = 14.6 X 108 ; 8.1 X 106 for Cd·OHAPT and Cd-RPT complexes respectively. The stability constant order of these complexes is discussed based on the electron density on the donor, azomethine nitrogen and oxygen atoms.