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

Rachel Edrei; Avigdor Persky

doi:10.1016/0009-2614(89)87245-8

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

Rachel Edrei, Avigdor Persky

Department of Chemistry

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The ratio of rate constants k_F+HBr/k^F+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 k_F+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 language	English
Pages (from-to)	265-270
Number of pages	6
Journal	Chemical Physics Letters
Volume	157
Issue number	3
DOIs	https://doi.org/10.1016/0009-2614(89)87245-8
State	Published - 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.

Funding

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

Funders	Funder number
Fund for Basic Research Administered
Israel Academy of Sciences and Humanities

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title = "The temperature dependence of the rate constant for the reaction F+HBr→HF+Br",

abstract = "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 W{\"u}rzberg 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.",

author = "Rachel Edrei and Avigdor Persky",

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AU - Persky, Avigdor

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AB - 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.

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

Abstract

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