Rate Constant for the Reaction between OH and CS2 at 298 and 520 K

Article abstract of DOI:10.1021/j100395a024

In an attempt to resolve discrepancies between published values of the rate constant for the reaction between hydroxyl radical and carbon disulfide, the reaction has been studied in a discharge flow system by using resonance fluorescence for kinetic measurements and mass spectrometry for product analysis.On the basis of the measured rate constant for disappearance of OH and measurements of the amount of carbonyl sulfide formed, it was estimated that for the reaction HO + CS2 -> HS + OCS, k 3s^-1 at 520 K and 3s^-1 at 298 K, upper limits being specified because of the inability to isolate exclusively this reaction channel, and because of possible involvement of wall reactions.These results confirm the low values found for this rate constant in two very recent studies.