Arrhenius plots for TS_C−D, TS_F−G, and TS_G−H (A, B, and C respectively) of the Fe²⁺ @SiO₂ catalyst. The values of the natural logarithm of the rate constant (ln(k)) are represented in years⁻¹ and the inverse of the temperatures (1/T) in kelvin (K). Represented in blue are the RRKM rate constants and in orange the rate constants considering tunnelling. Also included are the fits and correlation coefficients