Elementary reactions of the SF radical. Part 1.—Rate constants for the reactions F + OCS → SF + CO and SF + SF → SF2+ S

Abstract

Elementary reactions involving ground-state SF(X²Π) radicals have been studied at 295 K in a discharge-flow system near 1 Torr‡ using mass-spectrometric detection with collision-free sampling. SF radicals were generated by the reaction of F(²P_J) atoms with OCS: F + COS [graphic omitted] SF + CO (1). Rate constants are reported for reaction (1) as well as for the bimolecular disproportionation of SF SF + SF [graphic omitted] SF₂+ S (2a)k₁=(1.81 ± 0.16)× 10^–11; k_2a=(2.52 ± 0.19)× 10^–11 cm³ s^–1(1σ).

In addition, the N(⁴S)+ NO reaction has been studied as a reference reaction N + NO [graphic omitted] N₂+ O and the following result obtained: k₃=(2.03 ± 0.17)× 10^–11 cm³ s^–1(1σ).