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Comparison of the mass spectrometric behaviour of fluorinated ethers and sulphides
Author(s) -
Favretto D.,
D'Alpaos M.,
Traldi P.,
Bégué J. P.,
BonnetDelpon D.,
Rock M. H.
Publication year - 1995
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.1290091410
Subject(s) - chemistry , decomposition , metastability , ethylene , hydrogen atom , fluorine , molecule , hydrogen , mass spectrum , polyatomic ion , mass spectrometry , ion , computational chemistry , organic chemistry , photochemistry , alkyl , chromatography , catalysis
The mass spectrometric behaviour of two pairs of fluorinated vinyl‐ and allyl‐ethers and thioethers has been studied in detail with the aid of metastable ion data and accurate mass measurements. Clear differences have been observed between the two sets of compounds; while for the ethers the McLafferty rearrangement with ethylene loss represents a highly favoured decomposition route, for the thioethers the loss of the ethyl radical is preferred. Some decomposition routes, common to all the compounds examined, suggest the presence of hydrogen atom bridging between carbon and fluorine atoms. Theoretical calculations have shown that such a quasi CHF structure is already present in the neutral molecule in its ground state.