and O 2 transfer 0.17e -if calculated as a complex). Analogously, ammonium fluoride does not dissociate heterolytically with EEQ (q F = -0.33 at a distance of 6 Å). The equilibrium distance of 2.87 Å was determined by optimization with ωB97X-3c. For ωB97M-V, 77 the def2-TZVPPD basis set 78 was employed.