Synthesis, crystal structure and characterizations of di-μ-cyanido-1:2κ2N:C;2:3κ2C:N-bis-(4,7,13,16,21,24-hexa-oxa-1,10-di-aza-bicyclo-[8.8.8]hexacosa-ne)-1κ8N1,N10,O4,O7,O13,O16,O21,O24;3κ8N1,N10,O4,O7,O13,O16,O21,O24-[5,10,15,20-tetra-kis-(4-chloro-phen-yl)porphyrinato-2κ4N]-2-iron(II)-1,3-dipotassium(I) tetra-hydro-furan disolvate with an unknown solvent.

The title compound, [Fe(C₄₄H₂₄N₈Cl₄)(CN)₂][K₂(C₁₈H₃₆N₂O₆)₂]·2C₄H₈O was synthesized and characterized by single-crystal X-ray diffraction as well as FTIR and UV-vis spectroscopy. The central Fe^II ion is coordinated by four pyrrole N atoms of the porphyrin core and two C atoms of the cyano groups in a slightly distorted octa-hedral coordination environment. The complex mol-ecule crystallizes with two tetra-hydro-furan solvent mol-ecules, one of which was refined as disordered over two sets of sites with refined occupancies of 0.619 (5) and 0.381 (5). It has a distorted porphyrin core with mean absolute core-atom displacements C_a, C_b, C_m and C_av of 0.32 (3), 0.22 (3), 0.56 (2) and 0.37 (14) Å, respectively. The axial Fe-C_cyano bond lengths are 1.991 (2) and 1.988 (2) Å. The average Fe-N_p (N_p is a porphyrin N atom) bond length is 1.964 (10) Å. One of the O atoms and several C atoms of the 222 moiety [222 = 4,7,13,16,21,24-hexa-oxa-1,10-di-aza-bicyclo-[8.8.8]hexa-cosa-ne] were refined as disordered over two sets of sites with occupancy ratios of 0.739 (6):0.261 (6) and 0.832 (4):0.168 (4). Additional solvent mol-ecules were found to be highly disordered and their contribution to the scattering was removed using the SQUEEZE procedure in PLATON [Spek (2015 ▸). Acta Cryst. C71, 9-18], which indicated a solvent cavity of volume 372 ų containing approximately 83 electrons. These solvent mol-ecules are not considered in the given chemical formula and other crystal data.