Optoacoustic method of measuring reaction rates of the radicals CH3, CD3, C2H5 and CH2I with I and I2

Abstract

It is shown how a modulating concentration of radicals, produced photolytically, can be used in an optoacoustic system to give kinetic information. The acoustic signal is the result of the enthalpy change present in the reaction. Results are reported for the rate constants of the reactions X + I2→ XI + I, where X is CH3, C2H5, CD3 and CH2I. Rate constants are also measured for the radical recombination of X with I in the presence of 100 Torr krypton.