The Arrhenius parameters for the reactions of O atoms with ethene and five fluoroethenes.

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概要

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• The rate constants for the reactions of ground-state oxygen atoms with ethene and five fluoroethenes have been measured over the temperature range of 240–450 K, using a pulse radiolysis-resonance absorption technique. The rate constants were well expressed by the following Arrhenius expressions: <I>k</I>(O+C<SUB>2</SUB>H<SUB>4</SUB>)=8.4×10<SUP>6</SUP> exp(−712⁄<I>T</I>); <I>k</I>(O+C<SUB>2</SUB>H<SUB>3</SUB>F)=3.1×10<SUP>6</SUP> exp(−622⁄<I>T</I>); <I>k</I>(O+CH<SUB>2</SUB>=CF<SUB>2</SUB>)=2.4×10<SUP>6</SUP> exp(−638⁄<I>T</I>); <I>k</I>(O+<I>cis</I>-CHF=CHF)=1.9×10<SUP>6</SUP> exp(−500⁄<I>T</I>); <I>k</I>(O+C<SUB>2</SUB>HF<SUB>3</SUB>)=3.0×10<SUP>6</SUP> exp(−544⁄<I>T</I>); <I>k</I>(O+C<SUB>2</SUB>F<SUB>4</SUB>)=8.1×10<SUP>6</SUP> exp(−634⁄<I>T</I>), in units of m<SUP>3</SUP>mol<SUP>−1</SUP> s<SUP>−1</SUP>. The change in the preexponential factors with the degree of fluorination is discussed in terms of the conventional transition-state theory.

• 公益社団法人 日本化学会の論文

著者

• SUGIYAMA Koichiro

  Department of Physics, Faculty of Science, Yamaguchi University

• Sato Shin

  Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology

• Tsunashima Shigeru

  Department of Applied Physics, Tokyo Institute of Technology

• Umemoto Hironobu

  Department of Applied Physics, Tokyo Institute of Technology

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