What, Methane Again?!

ABSTRACT

A combination of an error discovered in the Multiwell code and some more recent examinations of the system CH₃ + H = CH₄ prompted a reexamination of earlier work by this author. Values of the energy transfer parameter, 〈ΔE_d〉, are considerably different from the previous study. It is suggested that the Baulch et al. parameters for this system can be improved by replacing the values for k_rec,₀ and k_rec,_∞ with values suggested by Troe and Ushakov. k_rec,₀ = [Ar] 10^−26.19 exp[–(T/21.22 K)^0.5] cm⁶ molecule⁻² s⁻¹, k_rec,_∞ = 3.34 × 10⁻¹⁰ (T/25200 K)^0.186 cm³ molecule⁻¹ s⁻¹ while keeping their value for F_c = 0.63 exp(–T/3315) + 0.37 exp(–T/61).