Molecular motion and methyl group rotation barriers from 13C nmr relaxation times. Norbornane and adamantane derivatives in solution
Keyword(s):
The carbon-13 relaxation time data for several norbornane and adamantane derivatives are presented. It is shown that the most probable principal axis of the rotational diffusion tensor is an axis which contains the centre of mass of the molecule and the heterosubstituent. The influence of the C—Ĉ—H bond angle on the calculation of methyl group rotation barriers from relaxation time data and on the barrier is discussed.
1992 ◽
Vol 47
(5)
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pp. 689-701
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1980 ◽
Vol 64
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pp. 57-65
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