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Pyrolysis of 1-chloro-1,1-difluoroethane in the absence and in the presence of CCl4 and mixtures of CCl4 + HCl

✍ Scribed by G. Huybrechts; Y. Hubin

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 354 KB
Volume: 17
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550170204

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✦ Synopsis

The thermal dehydrochlorination CF,CICH, + CFFCH, + HCl has been studied in a static system between 637 and 758 K. It is a homogeneous, molecular first-order reaction and its rate constant is given by log,, (k, s-') = -(53,400 2 100)/4.576T + (12.21 ? 0.03) This reaction has also been studied in the presence of CCl, and mixtures of CCl, and HCl between 585 and 662 K. It is then accelerated and the initial rate increase is given by with log,, (k', L1" /mo11'2 1 s) = -(41,650 t 180)/4.576T + (10.84 ? 0.06) and log,, k" = (7900 ? 180)/4.576T -(0.59 ? 0.06). A radical chain mechanism is shown to be consistent with these latter results.

Experimental

CF,ClCH, (Solvay), CCl, (Aldrich), and HC1 (Air Liquidle), 99.98%, 99.99%, and 99.995% pure, respectively, were used without further purification. * Predoctoral bursar of Belgian IWONL.

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