Reactions of Ar+ with halocarbons and of I+ with CF3I

Article abstract of DOI:10.1063/1.463605

The gas phase reactions of Ar⁺ with the halocarbons CF3Cl, CF3Br, CF3I, CF4, C2F6, and C2F4 have been studied using a variable temperature-selected ion flow tube (VT-SIFT) instrument operated at 298 and 500 K.Rate constants and product branching percentages were measured at both temperatures.Ar⁺ reacts at the collisional rate with all of the above neutrals at both 298 and 500 K.The reactions with CF3X yield CF3⁺ and CF2X⁺ for all X (the reaction with CF4 produces only CF3⁺).For X = I, there is an additional channel leading to the ionic product I⁺.The reaction of Ar⁺ with C2F6 produces both CF3⁺ and C2F5⁺.The reaction of Ar⁺ with C2F4 forms a rich product spectrum consisting of the ions CF⁺, CF2⁺, CF3⁺, C2F3⁺, and C2F4⁺.The reaction product distributions are compared with results from ionization experiments such as photoion-photoelectron coincidence (PIPECO) and electron impact mass spectrometry, and in some cases excellent agreement is found.The reaction of I⁺ with CF3I, which is a secondary reaction in the Ar⁺/CF3I system, was investigated at 298 K in separate experiments.This reaction is rapid and forms four product ions: CF3⁺, CF2I⁺, CF3I⁺, and I2⁺.The results are compared with previously published information.

Full text of DOI:10.1063/1.463605

Reactions of Ar+ with halocarbons and of I+ with CF3I
Robert A. Morris, Jane M. Van Doren, A. A. Viggiano, and John F. Paulson
Citation: J. Chem. Phys. 97, 173 (1992); doi: 10.1063/1.463605
View online: http://dx.doi.org/10.1063/1.463605
View Table of Contents: http://jcp.aip.org/resource/1/JCPSA6/v97/i1
Published by the American Institute of Physics.
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Downloaded 07 Nov 2012 to 132.236.27.111. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions

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