ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The thermal cyclodimerization of hexafluoropropene and its cycloaddition to chlorotrifluoroethene have been studied at 570-700 K and 8-62 kPa. Both reactions give 1,2-substituted hexafluorocyclobutanes. For the intercombination product 1-chloro-2-trifluoromethyl-hexafluorocyclobutane infrared, nuclear magnetic resonance and mass spectra as well as vapor pressure are reported. The rates of reaction can be expressed by the following equations: \documentclass{article}\pagestyle{empty}\begin{document}$$ 2{\rm CF}_{\rm 2} {\rm = CFCF}_{\rm 3}\to{\rm C}_{\rm 4}{\rm F}_{\rm 6}{\rm(CF}_{\rm 3}{\rm )}_{\rm 2}{\rm, k = 8}{\rm .2}\times {10}^{3}{exp( - 143,700 J/mol}RT){\rm m}^3 /{\rm mol} \cdot {\rm sec} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm CF}_{\rm 2} {\rm = CFCF}_{\rm 3}+{ }{\rm CF}_{\rm 2}{\rm = CFCl} \to {\rm C}_{\rm 4}{\rm F}_{\rm 6}{\rm ClCF}_{\rm 3}{\rm, k = 7}{\rm .25}\times { 10}^{3} { exp( - 118,400 J/mol }RT){\rm m}^3 /{\rm mol} \cdot {\rm sec} $$\end{document} The reactions probably proceed by a biradical mechanism.
Additional Material:
8 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550111002
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