Study of Mixed Complexes of Cu(II) with Propylene Diamine, Malonate and Maleate Ions using Polarographic Technique

摘要

The mixed ligand complexes of propylene diamine (pn), malonate (mal) and maleate (male) with Cu(II) have been studied polarographically at constant ionic strength, μ = 1.5 M (NaNO3) and pH 6.43 at 25.0 ± 0.1 °C. The reduction of the complexes at d.m.e. is reversible and diffusion-controlled. One mixed complex [Cu(pn)(mal)] and [Cu(pn)(male)] is formed in each case with stability constants log β_(11) = 16.69 and 16.585 respectively.