Electrochemical Study of cis-Cyanoaquobis(ethylenediamine)chromium(III) Ion and Its Adducts with Hg(II) and Ag(I)

Abstract

The paper describes voltammetric and polarographic properties of the cis-cyanoaquobis(ethylenediamine)chromium(III) complex and the kinetics of its acid hydrolysis. The reactions of this complex with Hg(II) and Ag(I) ions were studied. Formation of di- and trinuclear adducts was found. Linkage isomerisation of CN bridging group in these adducts (Cr-NC-Hg and Cr-NC-Ag) was proposed on the basis of their electrochemical properties. The kinetics of formation and decomposition of [Cr(CN)(en)2(H2O)]2+ adducts with Hg(II) and Ag(I) are described and the factors affecting them are discussed.