The importance of an accurate CH4 vibrational partition function in full dimensionality calculations of the H+CH4→H2+CH3 reaction

The full dimensional rate constant reported by Huarte-Larrañaga and Manthe for the H+CH4→H2+CH3 reaction [Huarte-Larrañaga and Manthe, J. Chem. Phys. 113, 5115 (2000)] is corrected by using an accurate vibrational partition function for CH4 instead of the harmonic normal-mode one used by them. The correction is shown to be substantial over the temperature range considered by Huarte-Larrañaga and Manthe.