Three µ-X bridged diiron octapropylporphyrazine complexes having FeIII-O-FeIII, Fe+3.5-N=Fe+3.5 and FeIV=C=FeIV structural units have been prepared and characterized by UV-vis, EPR, X-ray absorption spectroscopy and electrochemical methods. Single crystals of all complexes were obtained from benzene-acetonitrile and their structures were determined by X-ray diffraction. In contrast to µ-oxo complex (6), µ-nitrido (7) and µ-carbido (8) dimers crystallized with one benzene molecule per two binuclear complex molecules arranged cofacially to porphyrazine planes at the Fe-Cbenzene distances of 3.435-3.725 Å and 3.352-3.669 Å for 7 and 8, respectively. The short distances suggest an interaction between iron sites and benzene system which is stronger in the case of FeIV=C=FeIV unit with higher Lewis acidity. The Fe-X-Fe angle increases in the row 6 - 7 - 8 from 158.52° to 168.5° and 175.10°, respectively, in agreement with the Fe-X bond order. However, the lengths of Fe-X bonds don’t follow this trend: Fe-O = 1.75/1.76 Å > Fe-C = 1.67/1.67 Å > Fe-N = 1.65/1.66 Å indicating unexpectedly long Fe-C bonds. This observation can be explained by back donation from µ-carbido ligand to Fe-C antibonding orbital thus decreasing the bond order which is confirmed by DFT calculations