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. Author manuscript; available in PMC: 2009 Aug 1.
Published in final edited form as: Acc Chem Res. 2008 Jul 23;41(8):905–914. doi: 10.1021/ar700267b

Figure 6.

Figure 6

Effect of π-acceptor and π-donor ligands on the energies of the ligand-field orbitals of three-coordinate iron compounds, as shown by computational studies.8,18,21,30 Interestingly, iron(I), iron(II), and iron(III) complexes can each have three electrons in the nearly degenerate yz/z2 orbitals. As in Figure 3, a non-standard choice of axes is used.