Crystal structure of [{FeCl 3 } 2 (μ-PC H P) 2 ] [PC H P = 1,3-bis-(2-di-phenyl-phosphanyleth-yl)-3 H -imidazol-1-ium] with an unknown solvent.

The crystal structure of the title compound, bis-{μ-1,3-bis-[2-(di-phenyl-phosphan-yl)eth-yl]-1 H -imidazole-κ2 P : P '}bis-[tri-chlorido-iron(III)], [Fe2 Cl6 (C31 H31 N2 P2 )2 ] or [{FeCl3 }2 (μ-PCH P)2 ] (PCH P = C31 H31 N2 P2 ), consists of dinuclear complexes that are located about centres of inversion. The FeIII cation is in a distorted trigonal-bipyramidal coordination with three chloride ligands located in the trigonal plane and two P atoms of symmetry-related PCH P ligands occupying the axial positions. Within the centrosymmetric complex, a pair of intra-molecular C-H⋯Cl hydrogen bonds between aromatic CH groups and chloride ligands are found. Individual complexes are linked into layers parallel to (01) by inter-molecular C-H⋯Cl hydrogen bonds. No pronounced inter-molecular inter-actions occur between these layers. This arrangement leaves space for disordered solvent mol-ecules. Electron density associated with these additional solvent mol-ecules was removed with the SQUEEZE procedure in PLATON [Spek (2015 ▸). Acta Cryst. C 71 , 9-18]. The given chemical formula and other crystal data do not take into account the unknown solvent mol-ecule(s).