Rate coefficients for the reaction HS+NO+M→HSNO+M (M=He, Ar, and N2) over the temperature range 250–445 K

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Abstract
HS radicals were generated by photodissociation of H2S at 193 nm and their disappearance monitored by LIF. The three‐body recombination of HS with NO has been studied over the temperature range 250–445 K using He, Ar, and N2 as diluent gases. The temperature dependences of the low‐pressure, three‐body rate coefficients are given by 10−(22.56±0.60)T−(3.28±0.27), 10−(23.27±0.50)T−(2.98±0.20), and 10−(24.43±0.94)T−(2.48±0.36) cm6 molecule−2 s−1 for He, Ar, and N2, respectively. A tentative value of (2.7±0.5)×10−11 cm3 molecule−1 s−1 for the high pressure limiting rate coefficient over the range 250–300 K is suggested on the basis of extrapolation. These kinetic data are evaluated in terms of unimolecular rate theory.

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