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Beckmann rearrangement in benzophenone oxime, a mass spectrometric study
Author(s) -
Majer J. R.,
Azzouz A. S. P.
Publication year - 1982
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.1210170806
Subject(s) - benzophenone , oxime , beckmann rearrangement , chemistry , mass spectrometry , isomerization , photochemistry , molecule , ion , ionization , analytical chemistry (journal) , organic chemistry , chromatography , catalysis
The isomerization of benzophenone oxime to benzanilide, previously observed to take place in the ion source of a mass spectrometer and attributed to a Beckmann type rearrangement of the benzophenone oxime molecule ion, has been shown to occur by a thermal mechanism prior to ionization. Mass spectrometric evidence is supplemented by infrared spectrophotometric examination of solid samples and shows that in the solid state, at room temperature, benzophenone oxime has a lifetime of about 600 h.