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The primary fragmentation step of isoxazole upon electron impact. A correlation with photochemistry
Author(s) -
Nakata Hisao,
Sakurai Hiroshi,
Yoshizumi Hideo,
Tatematsu Akira
Publication year - 1968
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.1210010203
Subject(s) - fragmentation (computing) , isoxazole , electron ionization , chemistry , ion , photochemistry , mass spectrum , ionization , electron , primary (astronomy) , spectral line , medicinal chemistry , organic chemistry , physics , astrophysics , quantum mechanics , astronomy , computer science , operating system
Three isomeric compounds, I, II and III, were prepared and their mass spectra recorded. Comparisons of the spectra showed that the fragmentation of I proceeds only by way of II, and that II itself is transformed in part to III upon electron impact. It is suggested that selective ionization of each one of the two isolated functional groups in II may afford two isomeric radical ions, II a and II b . A possible interrelation to the photochemistry of these compounds is also discussed.