Polarographic Studies of Mixed Complexes of Pb(II) with m -Nitro Benzoyl Glycine and Succinate Ions using NaNO3 as Supporting Electrolyte

Mixed ligand complexes of biologically relevant carboxylate ion succinate and m-Nitro Benzoyl Glycine with Pb(II) have been studied polarographically at constant ionic strength. u = 2.0 (NaNO₃) and at pH 6.4 Succinate is a key intermediate in the tricarboxylic acid cycle, a primary metabolic pathway used to produce chemical energy in the presence of O₂. The values of stability constants were obtained by Deford and Hurne's²⁰ method. The positive values of the mixing constants for the mixed-ligand complexes indicate that the mixed-ligand complexes are more stable than simple binary complexes. The reduction of the simple and mixed complexes is irreversible at a dropping mercury electrode.