Boron, energy level diagram

The energy level diagrams show one unpaired electron in a fluorine atom, two in an oxygen atom, and one in a boron atom. 

The expected MO energy-level diagram for the combination of the 2p orbitals on two boron atoms. 

The planar node of the three 2p orbitals gives them just slightly more energy than a 2s orbital, with its spherical node. Boron atoms therefore have two electrons in the Is orbital, two in the 2s orbital, and just one in one of the 2p orbitals. The orbital occupancy is shown in the energy level diagram on the left. You can imagine what shape each of the orbitals has we won t need to show a picture of them all superimposed. 

Fig. 24. Energy diagram of the boron-doped diamond/aqueous redox electrolyte solution interface (a) at the flat-band potential (b) at the equilibrium potential of Fe(CN)63, 4 system. Ec is the energy of conduction band bottom, Ev is the energy of valence band top, F is the Fermi level, Eft, is the flat-band potential. Shown are the electrochemical potential levels of the Fe(CN)63, 4 and quinone/hydroquinone (Q/H2Q) systems in solution. The electrode potential axis E is related to the standard hydrogen electrode (SHE). Reprinted from [110]. Copyright (1997), with permission from Elsevier Science.

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