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Electron impact and chemical ionization mass spectrometry of heterocumulenes produced by flash vacuum pyrolysis
Author(s) -
Brown Jeff,
Flammang Robert,
Govaert Yasmine,
Plisniedr Michel,
Wentrup Curt,
Van Haverbeke Yves
Publication year - 1992
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.1290060405
Subject(s) - chemistry , mass spectrometry , pyrolysis , chemical ionization , flash vacuum pyrolysis , electron ionization , protonation , ionization , tandem mass spectrometry , ion , molecule , ion source , analytical chemistry (journal) , photochemistry , organic chemistry , chromatography
Heterocumulenes such as ketenes, propadienones and comulogs of isocyanates are produced by flash vacuum pyrolysis of Meldrum's acid. Real‐time monitoring of the pyrolysis products is performed by methods of tandem mass spectrometry. In particular, chemical ionization is show, for the first time, to generate protonated moleculular ions of these kinetically unstable neutral molecules which can be identified by collisional activation experiments.