porphyrins of generation zero ([1⋅FeIII]Cl), one ([2⋅FeIII]Cl), and two ([3⋅FeIII]Cl) (Fig. 1) were prepared as models of cytochromes (Schemes 1 and 2). They feature controlled axial ligation at the iron center by two imidazoles tethered to the porphyrin core. Similar to the core compound [4⋅FeIII]Cl, they are six-coordinate low-spin complexes as demonstrated by UV/VIS (Figs. 3 and 4) and EPR spectroscopy