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A comparative study of the pyrolytic and electron impact‐induced fragmentations of 4‐phenylbutanoic acid and some analogues
Author(s) -
Posthumus M. A.,
Nibbering N. M. M.,
Boerboom A. J. H.
Publication year - 1976
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210110902
Subject(s) - pyrolytic carbon , pyrolysis , chemistry , deuterium , fragmentation (computing) , electron ionization , electron , electron capture , photochemistry , organic chemistry , nuclear physics , physics , ion , computer science , ionization , operating system
Abstract By use of deuterium labelling it is shown that the mechanisms of fragmentation of the title compounds upon Curie‐point pyrolysis and electron impact are essentially different. For example, the pyrolytic expulsion of water from 4‐phenylbutanoic acid is a 1,2 eliminations, whereas upon electron impact water is expelled via a 1,4 elimination; the generation of styrene from this acid proceeds via a concerted mechanism upon pyrolysis, but via a stepwise mechanism upon electron impact.