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Electron‐impact studies—L: Skeletal‐rearrangement fragments in the mass spectra of diphenylpyrazoles and ‐isoxazoles
Author(s) -
Simons B. K.,
Kallury R. K. M. R.,
Bowie J. H.
Publication year - 1969
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.1210020708
Subject(s) - mass spectrum , deuterium , labelling , chemistry , spectral line , electron ionization , cope rearrangement , stereochemistry , mass spectrometry , physics , organic chemistry , nuclear physics , ion , biochemistry , chromatography , astronomy , ionization
Abstract The mass spectra of all diphenylpyrazoles and ‐isoxazoles contain rearrangement peaks at m / e 165 [C 13 H 9 ] + . In addition, the spectra of 3,5‐diphenylisoxazoles contain peaks at m / e 180 [C 13 H 10 N] + , which are produced by specific phenyl migrations. The mechanisms of both rearrangement processes have been studied by deuterium labelling.