Reaction of Hot Hydrogen Atoms with COS

Abstract

Hydrogen atoms of energy 104 kJ mol-1 and 68 kJ mol'1 produced by photolysis of Hl react with COS to give CO and SH (1). The net probability of reaction (1) for atoms of initial energy H*4-COS ->CO 4- SH (1) 104 kJ mol-1 is 0.62. Added CO2, He, Ar, Kr and Xe reduce the probability of (1) by removing energy in moderating collisions. Relative values of the energy-loss parameter a for collisions between H* and the rare gases agree qualitatively with those calculated assuming rigid sphere collisions. The maximum cross-section for reaction (1) is shown to be much smaller than the collision cross-section.