ISSN:
0538-8066
Schlagwort(e):
Chemistry
;
Physical Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The decomposition of 1-chloro-1,1-difluoroethane by a radical chain reaction has been studied in a flow reactor in the temperature range from 503 to 773 K. For the initiation of the chain small amounts of added chlorine were photolyzed with a XeCl laser (λ = 308 nm). The formation of the dehydrochlorination and chlorination products, vinylidene fluoride, and 1,2-dichloro-1,1-difluoroethane respectively, is described by a kinetic model. Arrhenius parameters for the two abstraction reactions \documentclass{article}\pagestyle{empty}\begin{document}$${\rm CI + CH}_{\rm 3} {\rm CCIF}_{\rm 2} {\hbox to 25pt{\rightarrowfill}} {\hskip-18pt ^{K_2 }}{\hskip1em} {\rm HCI + CH}_{\rm 2} {\rm CCIF}_{\rm 2}$$\end{document} and \documentclass{article}\pagestyle{empty}\begin{document}$${\rm CI + CH}_{\rm 2} {\rm CICCIF}_{\rm 2} {\hbox to 25pt{\rightarrowfill}} {\hskip-18pt ^{K_7 }}{\hskip1em} {\rm HCI + CHCICCIF}_{\rm 2}$$\end{document} were determined by a competition method: \documentclass{article}\pagestyle{empty}\begin{document}$$\log _{10} (k_2 /cm^3 {\rm mol}^{{\rm - 1}} {\rm s}^{{\rm - 1}} = (13.6 \pm 0.1) - (9200 \pm 300)/4.576T$$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$\log _{10} (k_7 /cm^3 {\rm mol}^{{\rm - 1}} {\rm s}^{{\rm - 1}} = (13.7 \pm 0.1) - (6500 \pm 200)/4.576T$$\end{document} Experimental and modeling results are discussed with respect to former studies on the thermal reaction of 1-chloro-1,1-difluoroethane.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/kin.550210603
