Temperature dependence of the rate constant for the reaction OH + H₂S in He, N₂, and O₂

The rate constants of the reaction between OH and H₂S in He, N₂, and O₂ over the temperature range 245–450 K have been determined using the discharge flow‐resonance fluorescence technique. At 299 K, k₁ = (4.4 ± 0.7) × 10⁻¹² cm³ molecule⁻¹ s⁻¹. The temperature dependence of the rate constant can be fitted either by k₁ = 5.6 × 10⁻¹² exp(−57/T) or by k₁ = (3.8 × 10⁻¹⁹)T^2.43 exp(732/T) to within 8 and 9%, respectively. However, the non‐Arrhenius behavior can be confidently confirmed. The absence of the pressure dependence and the third‐body effect at low temperature suggest that the complex formation mechanism is not important over the temperature range of our study.