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Ion–neutral reorientation and unimolecular loss of alkanes from organic ions in the gas phase

✍ Scribed by P. Longevialle; O. Lefèvre

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
407 KB
Volume
28
Category
Article
ISSN
1076-5174

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✦ Synopsis

The loss of alkanes from ionized aliphatic alkanes, alcohols, ketones, ethers or amines takes place by a 1,2elimination involving a C -C bond cleavage and the specific rearrangement of a hydrogen atom to the incipient radical. This reaction should normally occur within a limited distance between the reactant sites. This condition is accomplished with most probability during a concerted (or quasi-concerted) mechanism, before the completion of the C-C bond cleavage. The same reaction may also occur, however, in ion-neutral complexes, i.e. by a nonconcerted mechanism, after the C-C bond cleavage is completed, provided that the probability is large enough for ion-neutral complexes to adopt suitable reactant configurations. This depends essentially on the proportion of possible reacting sites in the whole molecular ion.

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