Propylenediamine and trimethylenediamine have been found to form mixed complexes with Cd(II) in aqueous medium with stoichiometries 1:1:1 and 1:1:2. The overall formation constants of these mixed complexes have been evaluated usingSchaap andMcMaster's method. The tendency of the complexes (simple and mixed) to add and substitute another ligand is discussed.

Studies on mixed complexes of Cd(II) with propylenediamine and trimethylenediamine at the dropping mercury electrode

Studies on mixed ligands complexes formation in aqueous solution by the polarographic method—II: Cadmium-acetate-propionate system

Polarographic study of simple and mixed-ligand complex formation

Butanedioate and pentanedioate form 1 : 3 highest complexes separately with lead (II) in aqueous medium, three mixed complexes of these two ligands with the metal ion expected in solution being observed The formation constants of mixed complexes have been evaluated on the basis of polarographic measurements by the method of Schaap and McMasters The formation constants of the mixed complexes [Pb(X)(Y)]2−, [Pb(X)(Y)2]4−, and [Pb(X)2(Y)]4− are 357, 422, and 449 respectively in their logarithmic form at 303 K, where X2− and Y2− stand for butanedioate and pentanedioate ion, respectively The statistically calculated values of logarithm of formation constants are 343, 443, and 449 in the above order The small differences in the observed and calculated values may be due to electrostatic, steric etc factors The relative probability of the existence of these mixed complexes and also simple complexes has been explained

K. K. Choudhary

Papers

Mixed ligand complexes formed by cadmium ion with dioate ions

Lead(II) butanedioate-pentanedioate mixed complexes.