Kinetic study of the reactions of chlorine atoms with fluoroethane and d-fluoroethane in the gas phase

The kinetics of the gas-phase reactions of the chlorine atoms with fluoroethane (C2H5F) and d-fluoroethane (C2D5F) was studied experimentally. The relative rate method was applied using Cl + CH3Cl as the reference reaction. The rate constants for H-abstraction from C2H5F (kH) and D-abstraction from C2D5F (kD) were measured in the temperature range of 298–528.5 K. The temperature dependency of the rate constants are described by the expressions: kH = (2.11 ± 0.20) × 10−11exp(−317 ± 12/T) cm3 molecule−1 s−1 and kD = (1.57 ± 0.18) × 10−11exp(−513 ± 26/T) cm3 molecule−1 s−1. KIE, kinetic isotope effect, described by the ratio kH/kD, was found to be 2.73 ± 0.14 at 298 K.