Nuclear magnetic resonance study of exchanging systems. IX. The slow rotation of the methyl group in sterically overcrowded compounds.
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概要
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In order to obtain information about the slow rotation of methyl groups, the <SUP>1</SUP>H NMR spectra of 9-<I>t</I>-butylethenoanthracene and 9-<I>t</I>-butyltriptycene derivatives were measured at very low temperatures. It was found that the signals of the two methyls of the <I>t</I>-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.
- 公益社団法人 日本化学会の論文
著者
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NAKANISHI Hiroshi
National Chemical Laboratory for Industry
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YAMAMOTO Osamu
National Chemical Laboratory for Industry
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