Arrhenius plots for the elementary steps associated with ${\text{TS}}_{{\text{H}}_2\text{C}-\text{O}}$ (panel A), TS1 (panel B), TS2 (panel C), and TS6 (panel D). The values of the natural logarithm of the rate constant (ln(k)) are represented in yr^–1 and the inverse of the temperatures (1/T) in K^–1. RRKM constants, without considering tunneling and considering tunneling, are represented in blue and orange, respectively.