Note that the free energy ∆𝐺 232 ‡ (𝑝) does not contain zero-point vibrational correction and thermal correction, assuming their negligible contributions to ∆𝑉 ‡ . The components of ∆𝐺 ‡ are the electronic energy and cavitation energy computed by XP-PCM (eq. 1). Note that for the ∆𝑉 ‡ calculations, ∆𝐺 232 ‡ at different pressures are computed using as the reference isolated reactant molecules, not the vdW complexes (pre-TS minima) in Figure . This is to ensure a common reference (isolated reactants) in the ∆𝑉 ‡ comparison for different mechanisms.