917499-87-7Relevant articles and documents
Kinetics of the Reduction of a Tetra-μ-acetato-dirhodium Cation by Substituted 1,2- and 1,4-Dihydroxybenzene Compounds in Aqueous Perchlorate Media
Herbert, John W.,Macartney, Donal H.
, p. 1931 - 1936 (2007/10/02)
The kinetics of the reduction of the tetra-μ-acetato-dirhodium cation, +(+), by substituted 1,2- and 1,4-dihydroxybenzene compounds (H2Q) have been investigated in aqueous perchlorate media.The observed rate equation (below) is interpreted in terms of a rate- -d+>/dt=2(k1+k2K1/+>)+> determining one-electron oxidation of H2Q or HQ- to a semiquinone radical intermediate.The rate constants for the cross-reactions are correlated with the semiquinone reduction potentials by means of the Marcus relationship.Self-exchange rate constants for the dihydroxybenzene/semiquinone and semiquinone/quinone couples are discussed in terms of the inner-sphere and solvent reorganization energies for electron exchange.