STABILITY CONSTANTS AND RELATED THERMODYNAMIC FUNCTIONS OF Cu+2, Ni+2, Co+2 AND Mn+2 COMPLEXES OF METHYLENEBIS (THIOACETIC ACID)

The stability constants of Cu+2, Ni+2, Co+2 and Mn+2 complex of methelenbis (thioacetic acid) have been determined in aqueous media at u=0.IM (NaClO4) and 20o, 30o and 40oC employing Bjerrum-Calvin pH titration techniques of refined by alternative methods. The stability of complexes follows the order:- Cu+2> Ni+2> Co+2> Mn+2 The free energy enthalpy and entropy changes involved in the complexation have also been evaluated at30oC.

R S SAXENA ,RESHMA D PARIKH ,