Abstract
The rate of solvolytic aquation of bromopentaamminecobalt(III) ion has been measured in aqueous medium in the presence of maleate and phthalate anions at 40°, 45° and 50°C. The rate accelerating influence of maleate and phthalate is attributed to the formation of more labile ion-pairs. The rate and association constants of the ion-pairs have been calculated. Product analysis has been carried out in order to evaluate the participation of the associating anions in the act of substitution. Activation parameters for the aquation of the ion-pairs and of the other reaction pathways have been determined. Enthalpy, entropy and free-energy changes of the association equilibria have also been calculated.
Published Version
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