Novel eliminations of neutral fragments from ions during mass spectrometry. Part V. Evidence for cyclisation processes in the elimination of methyl from stilbene analogues
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- p. 2540-2543
- https://doi.org/10.1039/j39680002540
Abstract
The elimination of a methyl group from diarylethylenes (I) and 1,4-diphenylbutadiene has been investigated by 13C-labelling. The results show that cyclisation of the molecular ion must occur and comparisons with photochemical reactions are examined. The cyclisation of the molecular ion of 1,4-diphenylbutadiene appears to follow Woodward-Hoffmann Rules for an excited state process; the formation of tropylium from this ion is discussed.Keywords
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