… . Deuteroxide/hydroxide isotope effects as a measure of proton transfer in the transition states for E2 elimination of 2-(p-trimethylammoniophenyl) ethyl'Onium ions and …

DA Winey, ER Thornton

Index: Winey,D.A.; Thornton,E.R. Journal of the American Chemical Society, 1975 , vol. 97, # 11 p. 3102 - 3108

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Citation Number: 46

Abstract

Abstract: Deuteroxide/hydroxide kinetic isotope effects for the compounds p-(CH,) 3N+ C6HdCH2CH2X with various leaving groups X, whose syntheses are described herein, were determined at 60, as follows (X,~ DO-/~ HO-): N+(CH3) 3, 1.62 & 0.12; N+(CH3) 2CsHs, 1.68* 0.02; S+(CH3) 2, 1.54 f 0.02; F, 1.66 & 0.03; C1, 1.40 k 0.03; Br, 1.30 2~ 0.02. These isotope effects are best interpreted as measuring different extents of proton transfer ...