Abstract

The mixed ligand complexes of imidazole (Im) and malonate (Mal) with Cd(II) have been studied polarographically at constant ionic strength, μ = 2.0 (NaNO 3) and pH 8 at 25 ± 0.1°C. The reduction of the complexes at d.m.e. is reversible and diffusion-controlled. Three mixed complexes, [Cd(Im)(Mal)], [Cd(Im)(Mal) 2] 2− and [Cd(Im) 2(Mal)] are formed. Their overall stability constants at 25°C are: log β 11 = 4.0, log β 12 = 4.4 and log β 21 = 5.9, respectively.

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