Electronic interaction between the methyl group and trigonal carbon

JB Lambert, RJ Nienhuis

Index: Lambert, Joseph B.; Nienhuis, Ronald J. Journal of the American Chemical Society, 1980 , vol. 102, # 22 p. 6659 - 6665

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Citation Number: 8

Abstract

Abstract: The nature of the interaction between methyl and a trigonal carbon has been examined by the effect of substituents on the methyl rotational barrier. Barriers have been measured for para-substituted toluenes and for cis-and trans-substituted propenes by the motional effects of methyl rotation on dipole-dipole spin-lattice relaxation. The toluene barriers exhibit a fair correlation with u1 and a very poor one with uR. Thus ...