Aquation of penta-ammine(dimethyl sulphoxide)cobalt(III) perchlorate in water–non-aqueous solvent mixtures
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 7,p. 716-719
- https://doi.org/10.1039/dt9740000716
Abstract
The aquation rate constant of penta-ammine(dimethyl sulphoxide) cobalt(III) ion in various aqueous and aqueous–non-aqueous solvent mixtures has been determined. The rate constant does not correlate well with water activity, the Grunwald–Winstein solvating-power Y parameter, or the heat of mixing of dimethyl sulphoxide with the solvent components. The data support an Id mechanism more readily than a D mechanism. The activation enthalpy and entropy are 23·9 ± 0·7 kcal mol–1 and 0·36 ± 2·29 cal K–1 mol–1, respectively.Keywords
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