Thermal electron attachment to chlorinated alkenes in the gas phase

Abstract

This paper reports the measurements of the rate coefficients and the activation energies of the electron capture processes with various chlorinated alkenes. The electron attachment processes in the mixtures of chlorinated alkenes with carbon dioxide have been investigated using a Pulsed Townsend technique. This study has been performed in the temperature range (298–378)K. The obtained rate coefficients more or less depended on temperature in accordance to Arrhenius equation. The activation energies (Ea’s) were determined from the fit to the experimental data points with function ln(k)=ln(A)−Ea/kBT. The rate coefficients at 298K were equal to 1.0×10−10cm3s−1, 2.2×10−11cm3s−1, 1.6×10−9cm3s−1, 4.4×10−8cm3s−1, 2.9×10−12cm3s−1 and 7.3×10−12cm3s−1 and activation energies were: 0.27eV, 0.26eV, 0.25eV, 0.21eV, 0.55eV and 0.42eV, for trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, trichloroethylene, tetrachloroethylene, 2-chloropropene, 3-chloropropene respectively.