Absolute reaction rate of chlorine atoms with iodomethane

Article abstract of DOI:10.1016/S0009-2614(97)00212-1

The reaction of atomic chlorine with iodomethane was studied in the gas phase with the very low pressure reactor technique over the temperature range 273-363 K. The absolute rate constant was given by the expression k = (1.33 ± 0.49) × 10^-11 exp[-(5.73 ± 1.00 kJ mol^-1)/RT] cm³ molecule^-1 s^-1. The reaction proceeds through an intermediate weakly bound adduct CH₃I-Cl and results in the formation of HCl and iodomethyl radical CH₂I. The kinetic isotope effect k_H/k_D of the reaction was independent of temperature and found to be 1.09 ± 0.4.