Oxidation of CS sub 2 by reaction with OH. 1. Equilibrium constant for the reaction OH + CS sub 2 r reversible CS sub 2 OH and the kinetics of the CS sub 2 OH + O sub 2 reaction

The reaction of OH with CS{sub 2} was studied in He (50 Torr), N{sub 2} (9-40 Torr), and SF{sub 6} (30-60 Torr) over the temperature range 249-318 K by using pulsed laser photolysis to generate OH and pulsed-laser-induced fluorescence to detect OH. The rapid approach of (OH) to equilibrium was observed at each temperature, indicating reversible formation of a CS{sub 2}OH adduct. Analysis of the (OH) temporal profiles provided the rate coefficients for the forward and reverse components of the reaction OH + CS{sub 2} + M {r reversible} CS{sub 2}OH + M and, hence, the equilibrium constant.