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Substituent effects in mass spectrometry—II. The effect of substituents on the dissociation of para and meta disubstituted benzenes
Author(s) -
Benoit F.
Publication year - 1972
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.1210061214
Subject(s) - substituent , chemistry , fragmentation (computing) , ion , dissociation (chemistry) , polyatomic ion , mass spectrometry , benzene , activation energy , collision induced dissociation , bond dissociation energy , computational chemistry , photochemistry , medicinal chemistry , organic chemistry , tandem mass spectrometry , chromatography , computer science , operating system
The effect of substituents on the activation energy for primary dissociation processes in the molecular ions of mono‐ and para and meta di‐substituted benzenes has been examined. Where the daughter ion retains the substituent group, variation of the energy of activation derives from a combination of the effects of substituents on the ionisation potential of the molecular ion and the appearance potential of the daughter ion. An equation relating the energy of activation for the fragmentation of the molecular ion of a mono‐substituted benzene to that of related para and meta di‐substituted benzenes is presented.