Similarly, there is an observable breakpoint around R + = -0.5 in the correlation of Löwdin atomic charges.(Figure ) This phenomenon can be explained with the investigation of e * g orbitals: the energy of d x 2 -y 2 becomes lower than d z 2 around the breakpoint, therefore electron-donating groups are increasing the preference for the 5 E minimum ( 5 T2 O h ) compared to the 5 B2 geometries. (Figure )