Ion molecule reactions in vinyl fluoride by photoionization. Effects of vibrational excitation on major reaction pathways

Creators: Williamson, Ashley D.; Beauchamp, J. L.

Abstract

Photoionization methods have been used to study the reactions of the molecular ion in vinyl fluoride to yield the ionic products C_3H_3F_2^+, C_3H_4F^+, and C_3H_5^+. Quantitative measurements are reported of the effect of the vibrational state of the reactant ion on the product distribution and overall reaction cross section. Reaction cross sections for all three channels decrease with reactant internal energy. The effect on the reaction pathway producing C_3H_3F_2^+ is especially pronounced, with 0.18 eV of vibrational excitation being sufficient to reduce the reaction probability by 75%. Deactivation of vibrationally excited reactant ions competes with the reaction and is shown to be an efficient process.

Additional Information

© 1976 American Institute of Physics. Received 15 October 1975. Online Publication Date: 28 August 2008. This research was supported in part by the United states Energy Research and Development Administration under Grant No. AT (04-3)767-8 and presents one phase of research carried out at the Jet Propulsion Laboratory, California Institute of Technology, under Contract No. NAS 7-100 from the National Aeronautics and Space Administration. The PIMS instrumentation was made possible by a grant from the President's Fund of the California Institute of Technology. Camille and Henry Dreyfus Teacher-Scholar, 1971-1976

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