Abstract
Solubilities and enthalpies of solution are reported for trimethylamine sulphur trioxide, Me3NSO3, dissolving in water and in aqueous potassium bromide and aqueous tetra-n-butylammonium bromide solutions. From these solubility data and published kinetic data, reactivity trends for hydrolysis of Me3NSO3 in aqueous salt solutions are analysed into initial state and transition state components. Setchenow coefficients are derived, both for Me3NSO3 itself and for its hydrolysis transition state. In both cases, the small changes in rate constant when salt is added stem from more marked effects of the salt on the initial and transition states.
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