Synthesis, Spectral Properties and Potentiometric Studies on Some Metal Schiff Base Complexes Derived from 4–chlorophenyl–2–aminothiazole

The complexes of type [Cr(L)2(H2O)Cl]0.5H2O, [Mn(L)2(H2O)2]1.5H2O, [Fe(L)2(H2O)Cl]2H2O, [Co(L)2(H2O)2]2H2O, [Ni(L)2(H2O)2]2H2O, [Cu(L)2-(H2O)2]2H2O, and [Cd-(L)2(H2O)2]1.5H2O, where L = salicylidene–4–chlorophenyl–2–aminothiazole, have been synthesized and characterized by different physical techniques. Protonation constants of Schiff base and stability constants of their binary metal complexes have been determined potentiometrically in 50% DMSO–water media at 25°C and ionic strength 0.10 M sodium perchlorate.