C-H dissociation rate constants of alkylbenzenes from hot molecule formed by 158-nm (F2 laser) irradiation

摘要

The C-H bond in the methyl group of toluene, p-xylene, and mesitylene dissociates to the corresponding radicals from the hot molecules with internal energy of 8 eV. The dissociation rate constants were measured by the method of nanosecond laser photolysis. These rate constants can be predicted by a statistical theory on the basis of those measured by 193 nm irradiation. The C-C bond in paracyclophane was found to dissociate by two photons at 193 nm.