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Isomeric [C 7 H 8 ] + ˙ and [C 7 H 7 ] + ions
Author(s) -
Zhao Guohong,
Gäumann Tino
Publication year - 1992
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.1210270413
Subject(s) - ion , cycloheptatriene , fragmentation (computing) , chemistry , molecule , analytical chemistry (journal) , toluene , reaction rate constant , kinetic energy , photon , exponential decay , atomic physics , physics , kinetics , stereochemistry , nuclear physics , organic chemistry , chromatography , quantum mechanics , computer science , operating system
The photofragmentation of an equimolar mixture of cycloheptatriene and [1, Me‐ 13 C 2 ]toluene was studied with photons of wavelength 488 nm in order to obtain a direct comparison between the two isomers. The idea was to check the extent to which these photons could be used as a probe to study the fragmentation processes. Whenever feasible, the data were treated by a kinetic scheme and rate constants were obtained by a non‐linear regression. It could be shown that the decay of both isomers follows a time behaviour described by two exponential decays. Evidence is presented that the faster decay leads to the benzyl ion. The photofragmentation of the [C 7 H 7 ] + ions follows a complex behaviour that can be superimposed by selective ion–molecule reactions.