Unimolecular reactivity; Photoionization; Tandem mass spectrometry; Difluoroethylene; vinylbromide
Abstract :
[en] Unimolecular reactivity of ionized difluoroethylene and vinylbromide have been investigated using photoionization mass spectrometry and tandem mass spectrometry. Kinetic energy release distributions corresponding to HF- and F- losses from 1,1-C2H2F2+ and to Br-loss from C2H3Br+ have been determined. At low internal energy the loss of HF from C2H2F2+ leads to the fluoroacetylene cation with a large kinetic energy release (0.4-2.5 eV) while at higher energy a new channel is opened, leading to C=CHF+ (fluorovinylidene) with a much smaller kinetic energy release (0.0-0.2 eV). For the F-loss from C2H2F2+ and the Br-loss from C2H3Br+ bimodal distributions have been observed. The possible role of excited states in these dissociations is discussed.
Disciplines :
Chemistry
Author, co-author :
Leyh, Bernard ; Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de dynamique moléculaire
Hoxha, A.
Franck, B.
Locht, Robert ; Université de Liège - ULiège > Département de Chimie (Faculté des sciences) > Laboratoire de Dynamique Moléculaire (Sciences)
Language :
English
Title :
Reactivity of Halogenoethylene Ions using Photoionization and Collisional Activation.
Alternative titles :
[fr] La réactivité d'ions halogenoéthyléniques par photoionization et activation collisionnelle.
Publication date :
1998
Event name :
14th International Mass Spectrometry Conference (IMSC)
Event place :
Tampere, Finland
Event date :
25-29 August 1997
Audience :
International
Main work title :
Advances in Mass Spectrometry: Volume 14.
Main work alternative title :
[fr] Progrès en Spectrométrie de Masse: Volume 14
Author, co-author :
Karjalainen, E. J.
Hesso, A. E.
Jalonen, J. E.
Karjalainen, U. P.
Publisher :
Elsevier Science B.V., Amsterdam, Netherlands
Collection name :
volume 14
Pages :
A062970/1-A062970/9
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
Commentary :
- PDF-version of Editor's Postprint available on request
- Version-pdf du tiré-à-part disponible sur demande
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