A pulse polarographic measurement of the kinetics of dissociation of the [RuIII(edta)] 2 dimer

Abstract

The dimeric edta complex of ruthenium(III) generated by the one-electron reduction of dimeric Ru III 1 2 (edta)] 2 at mercury electrodes dissociates into the well characterized, monomeric Ru III(edta)OH 2 complex at a rate that increases with the proton concentration. Normal and reverse pulse polarography were combined to measure the rate of the dissociation reaction. At pH 4.8 a rate constant of 0.7 s −1 was obtained, in good agreement with an estimate reported in a previous study by Sato and co-workers. (Bull. Chem. Soc. Jpn., 55 (1982) 797).