Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Kinetic Isotope Effects Involving Deuterated Benzylamine Nucleophiles

  • Published : 1991.02.20
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Abstract

The kinetic isotope effects (KIE) are determined for the reactions of benzyl benzenesulfonates (BBS), ethyl benzenesulfonates (EBS) and phenacyl benzensulfonates (PAB) with deuterated benzylamine nucleophiles. The inverse secondary ${\alpha}$-deuterium KIE observed were somewhat smaller than those for the corresponding reactions with aniline nucleophiles. The primary $KIE_s$ obtained with PAB were slightly greater than those for the corresponding reactions with anilines, which suggested that the inverse secondary KIE is decreased due to a relatively earlier transition state for bond-making with little change in the hydrogen bonding strength to the carbonyl oxygen.

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