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- W2320235057 abstract "The rates of addition, at 25° in water, of the SO3−− ion to nine saturated ketones and their ga-deuterated homologs have been measured. The secondary kinetic isotope effects, expressed by the ratios (kH/kD)f, have been determined. We have also measured the isotope effect during the hydrolysis of bisulfite addition compounds of twelve ketones: (kH/kD. These isotope effects are discussed in terms of electronic and steric factors. The transition state has been shown to be ”reactant-like” for the addition reaction: the inductive and steric factors are of little importance, if any. The main factor, responsible for the isotope effects, seems to have a hyperconjugative origin: the deuterated ketone is less stabilized by σ-π8 overlap than the normal one. The variations of the isotope effect from one compound to another are easily interpreted by the consideration of the stable conformations of the ketone and the change of hyperconjugative stabilisation from one ketone to another." @default.
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- W2320235057 date "1971-01-01" @default.
- W2320235057 modified "2023-09-27" @default.
- W2320235057 title "Reactions d'addition nucléophile sur les cétones" @default.
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- W2320235057 doi "https://doi.org/10.1016/s0040-4020(01)91720-x" @default.
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