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Mass spectra of pyrazine N ‐oxides. Studies on pyrazine derivatives. III
Author(s) -
Uchimaru F.,
Okada S.,
Kosasayama A.,
Konno T.
Publication year - 1971
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570080118
Subject(s) - pyrazine , chemistry , mass spectrum , deuterium , spectral line , electron ionization , ion , mass spectrometry , high resolution , analytical chemistry (journal) , medicinal chemistry , stereochemistry , organic chemistry , ionization , atomic physics , chromatography , physics , remote sensing , astronomy , geology
The mass spectra of pyrazine 4‐ and 1‐oxides, their di‐ N ‐oxides and corresponding pyrazines have been determined. The fragmentations induced by electron impact were examined by means of deuterium labeling and high‐resolution measurements. The most pronounced feature of the spectra was the appearance of M‐16 ion peaks. In the case of the methyl and methoxy derivatives of 1‐oxides, the intensity ratio of M‐17/M‐16 was larger than in the 4‐oxides.