Kinetics and Mechanism of the Ligand Substitution Reaction of the Di-μ-hydroxobis(bipyridyl)dipalladium(II) Ion with some Bio-relevant Ligands

摘要

The interaction of di-μ-hydroxobis(bipyridyl)dipalladium(II) with the selected bio-relevant ligands: thioglycolic acid (HL1), glutathione(HL2) and DL-penicillamine(HL3) has been studied spectrophotometrically in aqueous medium as a function of complex and ligand concentrations, pH, and temperature at constant ionic strength. Two consecutive reaction steps are observed: the first step is dependent on the incoming ligand concentration and the second step which is independent, is assigned to ring closure. The activation parameters, conductivity data and IR data obtained also support the proposed mechanism.