A correlation between. beta.-hydrogen isotope effects on carbon-13 NMR chemical shifts in unsaturated systems and the strength of hyperconjugative interactions

CH Arrowsmith, AJ Kresge

Index: Arrowsmith, Cheryl H.; Kresge, A. Jerry Journal of the American Chemical Society, 1986 , vol. 108, # 25 p. 7918 - 7920

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Citation Number: 18

Abstract

Abstract:@ Hydrogen isotope effects on the carbon-13 NMR chemical shifts of the trigonal carbon in CL3C (R)= X (L= H or D) are reported for 15 substances in which the positive charge density at the trigonal carbon is regulated through systematic variation of R and X. A linear relationship is found between these isotope effects and the chemical shifts of the trigonal carbons, and this is taken as evidence for dependence of the magnitude of these ...