Abstract
The effect of carbon-13 enrichment in the carboxyl group on the dissociation constant of benzoic acid has been determined in the temperature range of 10–30 °C. The isotope effect, K12/K13, decreases from 1.003 at 10 °C to 1.001 at 30 °C. The temperature dependence of the equilibrium isotope effect, measured by e.m.f. methods, could not be reproduced theoretically. The disagreement between experiment and theory is explained by means of a superimposed isotope effect due to solvation.
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Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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