The temperature dependence of the rate constant for the reaction F+HBr→HF+Br

Rachel Edrei, Avigdor Persky

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The ratio of rate constants kF+HBr/kF+H2 has been determined by a discharge-flow-mass spectrometric technique and was found to be independent of temperature in the range 203 to 298 K. Based on reported results for kF+H2 it is concluded that kF+HBr exhibits an Arrhenius temperature dependence in this temperature range. The present results indicate that the mechanism for the F+HBr reaction is probably a direct hydrogen atom abstraction, rather than one involving the formation of a FBrH complex, as suggested by Würzberg and Houston, who found a marked non-Arrhenius behavior for this reaction. The present results for F+HBr are consistent with our earlier results for the Cl+HBr reaction.

Original languageEnglish
Pages (from-to)265-270
Number of pages6
JournalChemical Physics Letters
Issue number3
StatePublished - 5 May 1989

Bibliographical note

Funding Information:
This research was supported by the Fund for Basic Research Administered by The Israel Academy of Sciences and Humanities.


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