Position orbital calculations of energy levels for p-block atoms

Exchange stabilization and the variation of ionization energy in the pn and dn series

“…( 5), are more convenient, because they are real functions and are spatially equivalent. Students are familiar with these orbitals, and Howald and Mubarak (7) have pointed out that they can be used for calculating electron repulsion energies just as easily as p-i, po, and pi can. Their spatial equivalence also makes them very convenient for our purpose, because it means that they give only two distinct repulsions: the one between two electrons in the same orbital, and the one between electrons in any two different orbitals (Table 4).…”