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Rate constants of the reaction of ozone with trans-1,2-dichloroethene and vinyl chloride in air

✍ Scribed by Jian Zhang; Shiro Hatakeyama; Hajime Akimoto

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
496 KB
Volume
15
Category
Article
ISSN
0538-8066

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✦ Synopsis

Kinetic studies on reactions of ozone with trans-1,2-dichloroethene (DCE) and vinyl chloride (VC) were performed in air. In the presence of scavengers of radicals, such as CHBCHO, the rates for both reactions are second order (first order in each reactant). Observed rate constants are (1.80 f 0.29) X cm3/molecule.s for DCE and (2.45 f 0.45) X cm3/molecule.s for VC. In the presence of CH3CH0, propene ozonide (CH3CHOOCHzO) was observed as a product in the case of VC. Peroxyformic acid (HC(0)OOH) was detected in both reactions. The Criegee mechanism was proposed to play a major role in the reaction of ozone with chloroolefins. The branching ratio of 0 3 + CHZ=CHCl-CHzOO + HCOCl (6a), CHClOO + HCHO (6b) was obtained as 76:24, and the fraction of the stabilized CHzOO was estimated to be 0.25 of that produced in reaction (6a).

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