Reprint of: Infrared chemiluminescence study of the reaction Cl + HI → HCl + I at enhanced collision energies

The detailed rate constant k(V′, R′, T′; T), where V′, R′ and T′ are product vibrational, rotational and translational energies, and T is the reagent translational energy (approximately 4.7–12 kcal mole−1), has been measured for Cl + HI → HCl + I by the infrared chemiluminescence method. The main findings are (a) that T becomes principally T′, (b) that V′ broadens in distribution and (c) a second peak appears in R′ of v′ = 4, at enhanced T.