Suppression of low product kinetic energies in reactions of FHO− and Cl−(H2O) with CH3I

Substantially different reaction dynamics, product branching ratios and time scales have been reported in crossed beam imaging experiments on the nucleophilic substitution reactions of Cl−(H2O) F−(H2O) with CH3I at 0.3 eV collision energy [Bastian et al., J. Phys. Chem. A 124, 1929 (2020)]. In particular, it was speculated that only undergoes via a ligand exchange intermediate. Here, we present crossed-beam scattering results for two title both show suppression low kinetic energies. We discuss this mechanism comparison recent + collisions. This also allows more detailed picture dynamics hydrated energy.