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Electron impact‐induced fragmentation of 15 N‐labelled 1,2,4‐triazoles
Author(s) -
Carlsen Per H. J.,
Gautun Odd Reidar,
Olsrød Bjørn
Publication year - 1992
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.1210270324
Subject(s) - fragmentation (computing) , electron ionization , mass spectrum , chemistry , ion , metastability , triazole , 1,2,4 triazole , mass , mass spectrometry , electron , medicinal chemistry , physics , organic chemistry , nuclear physics , chromatography , computer science , ionization , operating system
The electron impact‐induced fragmentation patterns of 3,5‐diphenyl‐l H ‐1,2,4‐[4‐ 15 N]triazole, 4‐ethyl‐3,5‐diphenyl‐4 H ‐1,2,4‐[4‐ 15 N]triazole, l‐ethyl‐3,5‐diphenyl‐l H ‐1,2,4‐[4‐ 15 N]triazole and the corresponding unlabelled compounds were established from exact mass measurements and from metastable ion evidence. Evidence for two fragmentation mechanisms was established for the formation of the m / z 104 peak in the spectrum of the 4‐ethyl compound. Only the 1‐alkylated triazole exhibited an intense peak at m / z 131. Major peaks at m / z 221 (222) and 118 are characteristic of the investigated triazoles.
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