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 HI react with COS to give CO and SH (1). The net probability of reaction (1) for atoms of initial energy H*+ COS → CO + 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 α 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.