13873-84-2Relevant articles and documents
Raybone, David,Watkinson, Timothy M.,Whitehead, J. Christopher
, (1987)
Reactions of Ar+ with halocarbons and of I+ with CF3I
Morris, Robert A.,Doren, Jane M. Van,Viggiano, A. A.,Paulson, John F.
, p. 173 - 179 (2007/10/02)
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.
