Today a mini-review on bimolecular nucleophilic substitution (SN2) reactions was published in ChemPhysChem, by Trevor Hamlin, Marcel Swart and Matthias Bickelhaupt. It describes the dependence of the energy profile on the nucleophile, leaving group, central atom, substituents, and solvent: The reaction potential energy surface (PES), and thus the mechanism of bimolecular nucleophilic substitution (SN2), depends profoundly on