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Current Topics in Electrochemistry   Volumes    Volume 2 
Recent developments in the electrochemistry of ruthenium-sulphoxide complexes
G. Balducci, G. Mestroni, E. Alessio
Pages: 323 - 344
Number of pages: 22
Current Topics in Electrochemistry
Volume 2 

Copyright © 1993 Research Trends. All rights reserved

The electrochemistry of two new classes of halogen-sulphoxide-Ru(III) complexes of general formula Na[trans – RuCl4(R2SO)L] and mer,cis - RuCl3(R2SO)(R2SO)L (R2SO = dimethylsulphoxide, tetramethylenesulphoxide; L = dimethylsulphoxide, tetramethylenesulphoxide, N-donor base) is reported. The parent compounds, namely Na[trans – RuCl4(DMSO)2] (1) and mer,trans- RuCl3(DMSO)2(DMSO) (2), display the richest behaviour in dimethylsulphoxide and water solution: on the time scale of cyclic voltammetry both give rise to square schemes trigered by the change in the coordination mode (from S-bonded to O-bonded and viceversa) of one dimethylsulphoxide ligand. The mechanism of these reacions as well as the long term behaviour on the bulk electrolysis time scale are fully investigated. The N-donor base substituted  derivatives give rise to reversible Ru(III)/Ru(II) electron transfers in water. Their redox potentials are discussed in connection with a recently proposed predictive additive model.
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