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Mass spectra of chlorinated veratroles (1,2‐dimethoxybenzenes)
Author(s) -
Knuutinen J.,
Korhonen I. O. O.
Publication year - 1987
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.1210220204
Subject(s) - fragmentation (computing) , chemistry , metastability , mass spectrum , ion , deuterium , electron ionization , carbon monoxide , polyatomic ion , spectral line , medicinal chemistry , organic chemistry , atomic physics , physics , computer science , catalysis , ionization , operating system , astronomy
The behaviour of all nine chlorinated veratroles (1,2‐dimethoxybenzenes) under electron impact has been investigated. The most common fragmentation processes are interpreted using metastable ion analysis and deuterium labelled compounds. For all compounds studied, the most common fragmentation route seems to be the primary loss of a methyl radical followed by loss of carbon monoxide. The ion formed has a well‐known quinonoid structure and fragments by several routes elucidated by metastable ion analysis. In general, the spectra of the positional isomers are shown to be practically similar and it is apparent that e.g. the 3‐ and 4‐chloro isomers can be differentiated only from the abundance ratio of the [MCH 3 COCH 3 ] + and [MCH 3 COH 2 O] + ions.