Electrochemical investigation of palladium complexes with organic sulphides and their use in extraction differential pulse polarography

Abstract

Dialkyl-, amino-, keto- and ketoaminosulphide complexes of palladium(II) are shown to undergo one- or two-step reduction in a mixed acetonitrile-toluene solvent containing Bu4NClO4 at 0.1 M concentration. The half-wave potentials of the complexes show a certain dependence on the ligand structure, a positive shift of the potentials being caused by an increase in the π-acceptor ability of the ligands. The limiting currents are proportional to the concentration of the complex, according to the Ilkovič equation. Fast-scan differential pulse polarography was applied to the determination of palladium(II) in the organic phase after extraction of its complex with dihexylsulphide. © 1987