Kinetic study of the reaction of chlorine atoms with chloromethane in the gas phase

The kinetics of the gas phase reactions of chlorine atoms with chloromethane and D-chloromethane CD3Cl was studied experimentally. The relative rate method was applied using Cl + CH3Br as the reference reaction. The rate constants for H-abstraction from CH3Cl (kH) and D-abstraction from CD3Cl (kD) were measured in the temperature range of 298–527 K and at a total pressure of 100 Torr. The derived temperature dependencies of the rate constants are given by kH = (1.7 ± 0.1) × 10−11 × exp(−1040 ± 10/T) and kD = (1.3 ± 0.2) × 10−11 × exp(−1470 ± 10/T) cm3 molecule−1 s−1. The kinetic isotope effect, described by the ratio kH/kD, was (1.35 ± 0.05) × exp(420 ± 10/T).