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The fragmentation behaviour of some spirobenzthiazoles under electron impact
Author(s) -
Herzig Ulrike,
Krenmayr Peter,
Varmuza Kurt
Publication year - 1980
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.1210150806
Subject(s) - heteroatom , fragmentation (computing) , electron ionization , moiety , chemistry , metastability , ring (chemistry) , deuterium , cleavage (geology) , molecule , computational chemistry , electron , stereochemistry , materials science , organic chemistry , atomic physics , physics , ionization , ion , nuclear physics , fracture (geology) , computer science , composite material , operating system
The electron impact induced fragmentations of ten spiro‐benzthiazoles have been studied. The principal decomposition reactions have been elucidated by metastable studies, exact mass measurements, and by deuterium exchange of the imino hydrogen. The primary fragmentation step is an α‐cleavage reaction, which leads to ring opening of the ring fused to the benzthiazole moiety of the molecule. The subsequent decompositions resemble those of cyclohexylamines. They follow a general pattern, the details of which are discussed with respect to the nature and position of the heteroatom in the saturated ring.