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Gas-phase reaction of chlorine atoms with acrylonitrile. Temperature and pressure dependence

✍ Scribed by Alfonso Aranda; Yolanda Dı́az de Mera; Diana Rodrı́guez; Ana Rodrı́guez; Beatriz Cabañas; Ernesto Martı́nez

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
197 KB
Volume
377
Category
Article
ISSN
0009-2614

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✦ Synopsis

The kinetics and mechanism of the reaction of chlorine atoms with acrylonitrile (CH 2 CHCN) (1) have been studied by the mass spectrometric discharge-flow method in the temperature range (260-333) K and at a total pressure between 0.5 and 3 Torr. At 1.0 Torr the following Arrhenius expression for the rate constant has been obtained from the kinetics of Cl radical consumption in excess of CH 2 CHCN: k 1 ¼ ð5:2 AE 1:6Þ Â 10 À14 exp½ð1400 AE 100=T Þ cm 3 molecule À1 s À1 . The reaction is found to proceed through an addition mechanism involving a relatively stable adduct. The atmospheric significance of the present results for acrylonitrile is also discussed.

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