Relative molecular orbital energies in tetrahedral complexes

Abstract
M.O. theory is used for classifying the energy levels of tetroxo complexes, and linear relations are shown to exist between the M.O. energies (and hence the electro-negativities) and the oxidation number and electron configuration of the central ion. The extent of π-bonding effects is quantitatively studied and compared with the analogous situation in the hexahalides.