Crystal structure of bis­(tetra­phenyl­phospho­nium) bis­(cyanido-κC)(29H,31H-tetra­benzo[b,g,l,q]porphinato-κ(4) N (29),N (30),N (31),N (32))ferrate(II) acetone disolvate

The crystal structure of the title compound, (C(24)H(20)P)(2)[Fe(C(36)H(20)N(4))(CN)(2)]·2C(3)H(6)O, is constructed from a tetra­hedral Ph(4)P(+) (tetra­phenyl­phospho­nium) cation, one [Fe(tbp)(CN)(2)](2−) anion (tbp = tetra­benzoporphyrin in its doubly deprotonated form), located on a centre of inversion, and an acetone mol­ecule as crystallization solvent. Since the mol­ecular structure of the M(tbp) moiety is insensitive to the kind of metal ion and its oxidation state, bond lengths and angles in the [Fe(tbp)(CN)(2)](2−) anion are similar to those in other M(tbp) compounds. The Fe(2+) ion, located on a centre of inversion, is coordinated by four N atoms of tpb in the equatorial plane and by two C atoms of the cyanide anion at axial positions in a slightly distorted octa­hedral configuration. The packing is stabilized by C—H⋯N inter­actions between the Ph(4)P(+) cation and the CN(−) ligand of the [Fe(tbp)(CN)(2)](2−) anion, and by C—H⋯π inter­actions between the Ph(4)P(+) cation, acetone solvent mol­ecules and the [Fe(tbp)(CN)(2)](2−) anion.