We identified eight relevant electronic configurations, the possible orbital occupation patterns of which are sketched in For the total multiplicities of 2S+1 = 1 (LS) and 5 (HS), one electronic configuration is found if the ligand remains closedshell. In LS1, all electrons are paired and found in the three lowest-lying d-orbitals. In HS1, all five d-orbitals are occupied, the lowest-lying one being doubly occupied. With two unpaired electrons in the π-system, additional configurations arise: in LS2 they are antiferromagnetically coupled and in HS3 they are ferromagnetically coupled to an intermediate spin Fe(II) of type IS3. An additional HS configuration, HS2, is characterized as an intramolecular redox event with one electron transferred from the iron center to the delocalized π-system, rendering the iron ion in an Fe(III) intermediate spin configuration.