The effect of A 0 and B 0 is thus that it scales the mean-field two electron interaction term. This scaling is identical to assigning an effective charge q occ eff = √ 1 + A 0 and q vir eff = √ 1 + B 0 respectively, which only influences the electron electron interaction. For this reason, we will refer to this (unphysical) effect as mean-field charge scaling. The same effect can be observed for all other terms that contain mean-field ERIs (A 4 , B 4 , A 12 , B 12 , A 15 , B 15 ):