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Electron ionization fragmentation of some isoindolone derivatives
Author(s) -
Mäki Esa,
Csende Ferenc,
Stájer Géza,
Vainiotalo Pirjo,
Pihlaja Kalevi
Publication year - 1994
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290081013
Subject(s) - chemistry , ion , fragmentation (computing) , electron ionization , ionization , mass spectrum , polyatomic ion , chemical ionization , mass spectrometry , analytical chemistry (journal) , organic chemistry , chromatography , computer science , operating system
Abstract The electron ionization mass spectra of eleven isoindolone derivatives are reported. The molecular ions of these compounds were stable, some of them even very abundant (8–29% of the total ion current). There were many ions common to all or most of the compounds studied, although the abundances varied markedly from case to case. The base peak varied also from compound to compound. The most important ions common to almost every compound were [M—(CH 2 ) i XH] + (ions a i ; i =1–4), [M—C 7 H 7 ] + (ion b ) and the ion pattern [ c —H], c and [ c + H] corresponding to the loss of fused carbocycle together with the carbonyl function. These ions are caused by α‐cleavages and inductive dissociations of the bonds of the molecular ion in respect to the hetero atoms X and/or N.