Issue 0, 1972

Kinetic isotope effects. Part 7.—Ionization of (d)-phenylmethylacetophenone

Abstract

Measurements are reported on the hydroxide-catalyzed ionization of (d)-phenylmethylacetophenone in the presence of varying amounts of dimethyl sulphoxide. The kinetic hydrogen isotope effect (kH/kT) increases with increasing basicity until at a H value of 16.5 it reaches a maximum. The value of the Brönsted exponent β is 0.49 ± 0.02 for both isotopes. For several media, activation energies and pre-exponential factors have been determined. The difference ETEH reaches a maximum at a H value of 16.8. The ratios of AH/AT reflect the importance of solvent reorganization contributions.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 1, 1972,68, 925-931

Kinetic isotope effects. Part 7.—Ionization of (d)-phenylmethylacetophenone

D. W. Earls, J. R. Jones and T. G. Rumney, J. Chem. Soc., Faraday Trans. 1, 1972, 68, 925 DOI: 10.1039/F19726800925

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