Application of Microwave Spectroscopy to Kinetic Study of the Reaction of Carbonyl Sulfide with Atomic Oxygen

Abstract

Microwave spectroscopy has been applied to the determination of the rate constant for OCS+O→SO+CO. A short cell of a parallel-plate type was devised for the detection of the SO radicals produced in a fast flow reactor. Production of the SO radical was traced by measuring its spectral line intensity under the condition of [OCS]>>[O]. The rate constant for the reaction was determined to be (7.1±0.7)×109 cm3/mol·s at room temperature (24–25) °C, in good agreement with the values obtained by other methods.