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Mechanism of Single-Electron Capture by the Dichlorocarbene Dication.
Leyh, Bernard; Hautot, D.
1996In Journal of the American Society for Mass Spectrometry, 7, p. 266-275
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Keywords :
Tandem mass spectrometer; Charge transfer; Kinetic energy release; Reaction window; Landau-Zener model; Demkov model
Abstract :
[en] The single-electron capture (SEC) by dichlorocarbene with eight different atomic and molecular target gases, (CCl2)2++G->(CCl2)++G+, has been studied by product ion spectroscopy and ion kinetic energy spectroscopy. The experimental data have been interpreted in the framework of a theoretical model that describes the charge exchange process. Exothermic charge exchange is handled within the Landau-Zener model, whereas endothermic charge exchange is described by the Demkov model. The calculated data reproduce qualitatively the essential features of the experimental results: (1) the appearance of a reaction window centered at an exothermicity in the 4-4.5 eV range, (2) the lower SEC cross sections for endothermic charge exchange, (3) the wider internal energy distributions obtained for CCl2+ in the endothermic regime than in the exothermic one, which results in larger dissociation yields, (4) the excitation of molecular targets that accompany their ionization in the SEC process, and (5) the kinetic energy released on the CCl++Cl fragments in dissociative SEC.
Research center :
Laboratoire de Dynamique Moléculaire
Disciplines :
Chemistry
Author, co-author :
Leyh, Bernard  ;  Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de dynamique moléculaire
Hautot, D.
Language :
English
Title :
Mechanism of Single-Electron Capture by the Dichlorocarbene Dication.
Alternative titles :
[fr] Le mécanisme de capture monoélectronique par le dication Dichlorocarbène.
Publication date :
1996
Journal title :
Journal of the American Society for Mass Spectrometry
ISSN :
1044-0305
eISSN :
1879-1123
Publisher :
Elsevier Science, New York, United States - New York
Volume :
7
Pages :
266-275
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRFC - Fonds de la Recherche Fondamentale Collective [BE]
Available on ORBi :
since 16 May 2012

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