The 70 eV Electron Impact mass spectrometric behaviour of some fluorinated alcohols, i.e. 2-fluoroethan-1-ol, 2,2,2-trifluoroethan-1-ol, 2,3,3,3-tetrafluoropropan -1-ol and 1,3-difluoropropan-2-ol, has been studied in detail by means of mass-analyzed ion kinetic energy spectroscopy, deuterium labelling experiments and comparison with nonfluorinated analogues. Composite metastable peaks related to HF loss have been rationalized by invoking the presence of two concurrent decomposition pathways, the first consisting of a 1–2 elimination and the second requiring the implication of hydroxyl hydrogen. This last process and other decomposition routes suggest the presence of H bridging the hydroxyl oxygen and fluorine.
Structures and reactivity of some fluorine-containing gaseous ions
CARBINI, MASSIMO;CONTE, LINO;
1992
Abstract
The 70 eV Electron Impact mass spectrometric behaviour of some fluorinated alcohols, i.e. 2-fluoroethan-1-ol, 2,2,2-trifluoroethan-1-ol, 2,3,3,3-tetrafluoropropan -1-ol and 1,3-difluoropropan-2-ol, has been studied in detail by means of mass-analyzed ion kinetic energy spectroscopy, deuterium labelling experiments and comparison with nonfluorinated analogues. Composite metastable peaks related to HF loss have been rationalized by invoking the presence of two concurrent decomposition pathways, the first consisting of a 1–2 elimination and the second requiring the implication of hydroxyl hydrogen. This last process and other decomposition routes suggest the presence of H bridging the hydroxyl oxygen and fluorine.
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