Evidence for extensive recombination of the ring-opened to the original cyclic molecular ions of 2-substituted piperidines and pyrrolidines after electron impact
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 9,p. 1655-1660
- https://doi.org/10.1039/p29830001655
Abstract
The unusually preferred formation of (M– alkyl)+ ions by α-fission of 2,2-dialkyl-substituted N-ethylpiperidines (2) and -pyrrolidines (3) and the virtual absence of ring degradation products is caused by facile recombination of the ring-opened to the original cyclic molecular ions. Suppression of ring opening of the initially formed molecular ions or conversion of the ring-opened into other isomeric molecular ions as explanations of the mass spectrometric behaviour of (2) and (3) are excluded.Keywords
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