Negative ion-molecule reactions of SF4

Article abstract of DOI:10.1063/1.442542

A study of some negative ion-molecule reactions involving SF4 has been carried ot by the flowing afterglow technique at ambient temperature.By ezamining a series of charge exchange reactions of SF4 and SF4^-, the electron affinity of SF4 has been determined to be 2.35+/-0.1 eV.Rate coefficients for the charge exchange reactions of HS^-, S^-, OH^-, and O^- with SF4 and of SF4^- with Cl2 and NO2 are reported.In addition, the fluoride transfer reactions of SF4^- and SF6^- with SF4 to produce SF5^- have been examined.That both reactions proceed indicates that the fluoride affinity of SF4 is greater than that of SF3 or SF5.A lower limit of 3.7 eV for the electron affinity of SF5 may also be deduced from the fluoride transfer reactions.The two body addition of halide ions (X^-) to SF4 to form the adduct SF4X^- proceeds at near the collision limit (k=9.7*10^-10cm³molecule^-1s^-1) for F^-, very slowly (k=2.6*10^-11cm³molecule^-1s^-1) for Cl^-1, and not at all within experimental limits (k<2*10^-12cm³molecule^-1s^-1) for Br^-1.

Full text of DOI:10.1063/1.442542

Negative ion–molecule reactions of SF4
Lucia M. Babcock and Gerald E. Streit
Citation: J. Chem. Phys. 75, 3864 (1981); doi: 10.1063/1.442542
View online: http://dx.doi.org/10.1063/1.442542
View Table of Contents: http://jcp.aip.org/resource/1/JCPSA6/v75/i8
Published by the American Institute of Physics.
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Downloaded 25 Feb 2013 to 136.159.235.223. Redistribution subject to AIP license or copyright; see http://jcp.aip.org/about/rights_and_permissions

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