Nuclear Magnetic Resonance Study of Exchanging Systems. IX. The Slow Rotation of the Methyl Group in Sterically Overcrowded Compounds
- 1 November 1977
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 50 (11) , 3018-3020
- https://doi.org/10.1246/bcsj.50.3018
Abstract
In order to obtain information about the slow rotation of methyl groups, the 1H NMR spectra of 9-t-butylethenoanthracene and 9-t-butyltriptycene derivatives were measured at very low temperatures. It was found that the signals of the two methyls of the t-butyl group in these compounds show a considerable line broadening at low temperatures, and it was made clear that the rotation of the methyl groups in these compounds is strongly restricted.Keywords
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