H. Loreto, E. Castellano
Jun 1, 1987
Citations
0
Influential Citations
1
Citations
Journal
Journal of Photochemistry
Abstract
The gas phase photochlorination of 1,2-dichloro-1,2-difluoroethylene was studied in a static system at temperatures between 30 and 90°C. The rate was measured under both continuous and intermittent light of wavelength 436 nm. The only final product, CFCl2,CFCl2, is formed according to the equation + d[C2F2Cl4]dt=k[Cl2]Jabs12 where J is the intensity of the absorbed light. The rate constants determined under continuous illumination are as follows: k30°C=5.63 ± 0.09 112 mol−12 s−12, k60°C = 10.43 ± 0.02 112 mol−12 s−12 and k90°C = 21.26 ± 1.4 l12 mol−12 s−12. The rate constants for the elementary reactions CFCl2ĊFCl+Cl2→C2F2Cl4+Cl and 2CFCl2ĊFCl→products are log k3=8.68-4810±300 4.57T and log k4=8.91±0.21 respectively, where k3 and k4 are in litres per mole per second.