Electron-transfer reactions and the self-exchange rate of the perruthenate(VII)-ruthenate(VI) couple

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)2221-2223
Journal / PublicationJournal of the Chemical Society, Dalton Transactions
Issue number13
Publication statusPublished - 1995


The kinetics of the reduction of perruthenate(VII) by [Fe(CN)6]4- and [W(CN)8]4- and the oxidation of ruthenate(VI) by [Mo(CN)8]3- and [Ru(CN)6]3- have been studied in aqueous alkaline solutions using stopped-flow techniques. The cross-reaction data have been treated according to the Marcus relations and yield a self-exchange rate constant of 10 ± 5 dm3 mol-1 s-1 (25.0°C, I = 1.0 mol dm-3) for the perruthenate(VII)-ruthenate(VI) couple. This rather slow self-exchange rate is discussed in terms of possible structural differences between perruthenate(VII) and ruthenate(VI) in alkaline solution.