A chronopotentiometric study of the reduction behaviour of some complexes of copper(II), palladium(II) and rhodium(III)

Abstract The chronopotentiometric reduction behaviour of several complexes of copper(II), palladium(II) and rhodium(III) has been investigated at platinum and mercury electrodes. The aquo complexes examined were shown to undergo some dissociation before reduction at the mercury electrode. With the exception of the ethylenediamine system ligand adsorption was observed on the mercury pool electrode. As a result it was possible to calculate the degree of adsorption of some of the ligands. The rate constants for the reduction of the copper complexes were measured and found to follow the same order as the polarographic reduction potentials.