Chemical shifts of the protons within a methyl group in a saturated hydrocarbon. Slow methyl group rotation

被引：4

作者：

Anderson, JE

机构：

[1] Chemistry Department, University College, London, WC1E 6BT, Gower Street

来源：

CHEMICAL COMMUNICATIONS | 1996年 / 01期

关键词：

D O I：

10.1039/cc9960000093

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the proton NMR spectrum of both (Bu(t))(3)CH and (Bu(t))(3)COH at -150 degrees C, one of the three separate signals for the methyl groups of a tert-butyl group appears as three singlets of equal intensity, with a greater than 1 ppm range of chemical shifts, showing that one methyl group is rotating slowly on the NMR timescale with a barrier to 120 degrees rotation of 5.3 kcal mol(-1) (1 cal = 4.184 J).

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页码：93 / 95

页数：3

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