Ion-molecule reactions in chloroethylene by ion cyclotron resonance spectroscopy

The ion-molecule reactions in vinyl fluoride have been studied as a function of pressure and electron energy. The C2H,-and C2HF+ fragment ions react predominantly by charge transfer while C2HBL produces C2H,F+ and C4H5'. The C2H2F7 fragment forms C2H4F+, CHFZ-, CzH3Fz+, C4H4F+, and probably C2H3 +. The rate constants for the individual reactions have been measured. The C2H3F+ ion reacts to form C3H5 +, C3H4F+, C3H3F, +, and C4H5F7 (in minor yield), both by a second order and by a third order reaction. The rate constants and product distributions from the individual reactions have been evaluated. A number of consecutive reactions have been identified and shown to be third order processes.

Section: Introductionmentioning

confidence: 99%

Ion–molecule reactions in vinyl fluoride

Herman¹,

Harrison²

1969

“…La stquence des reactions ion/moltcu!e dans le chlorure de vinyle pur est bien ttablie (8,(10)(11)(12)(13)(14). A pression elevte elle est complette par les processus [5]- [13] (15) Les travaux qui portent sur le transfert de H-dans certains melanges d7hydrocarbures d'alkyles (16) ou encore sur des melanges ccalcane + olCfine)), oh seule 1'olCfine est ionisCe (4), mettent en Cvidence le caractkre gCnCral de ces types de rkactions.…”

Section: Discussionunclassified

“…Dans un mtlange de telle proportion l'ion moltculaire du chlorure de vinyle n'apparait pas, de mCme que les des produits provenant des kactions ion-molecule du chlorure de vinyle pur (8,(10)(11)(12)(13)(14). Les ions les plus importants mis en tvidence par les spectres de masse sont les suivants: C5H8+, C5H9+, C5HI0+ ( fig.…”

Section: Figunclassified

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Réactions ion–molécule de C₂H₃Cl⁺ avec le propane et le n-butane

Herman¹,

Neagu-Plesu²,

Krzemien³

et al. 1989

Ion–molecule reactions of C2H3Cl+ with propane or n-butane have been studied using a photoionization mass spectrometer over the pressure range 0.01–1 Torr. The principal reasons for disappearance of the C2H3Cl+ ion in propane and n-butane are the H−, H2− transfer processes and charge transfer in the case of n-C4H10. The ions CnH2n+1+ and CnH2n+ formed in these transfers react preferentially with neutral vinyl chloride in condensation reactions with elimination of HCl or Cl•. Keywords: ion–molecule reactions, mass spectrometry, vinyl chloride, propane, n-butane. [Journal translation]

“…Les rtactions ion/moltcule de l'ion C2H3C1+ dans le chlorure de vinyle gazeux d'une part, et d e l'ion C2H5Cl+ avec le chlorure dYCthyle sont bien documenties (1)(2)(3)(4)(5)(6)(7)(8)(9).…”

Section: Introductionunclassified

Réactions ion/molécule de l'ion C₂H₃Cl⁺ dans le mélange gazeux: chlorure de vinyle – chlorure d'éthyle

Herman¹,

Neagu-Plesu²,

Wójcik³

1989

97 (1989). Ion/molecule reactions of C2H3C1+ have been studied in a mixture of vinyl and ethyl chlorides. The ionic processes have been followed using two mass spectrometers; one is based on the ionic cyclotronic resonance (ICR) while the other is based on photo-ionization at high pressure. The results obtained on these two instruments are complementary and they indicate that the ion C2H3C1+ does not react directly with ethyl chloride. However, the ions C4H3CI+ and C4H6C1+, which are formed following the decomposition of the excited ion-dimer of vinyl chloride, do react with ethyl chloride in a series of condensation reactions involving in each step an elimination of HC1 or of C1. In a mixture of the two chlorides, the most important ions are the C8H13+ and C8HI4+; at a pressure of 1 Torr, their total intensity is equal to 50%.