Crystal structure of bis-(4-nitro-aniline-κN (1))(5,10,15,20-tetra-phenyl-por-phy-rin-ato-κ(4) N)cobalt(III) chloride di-chloro-methane monosolvate.

Abstract

The reaction of [CoIII(TPP)Cl] (TPP is the dianion of 5,10,15,20-tetra­phenyl­porphyrin) with an excess of 4-nitro­aniline in di­chloro­methane leads to the title compound, [CoIII(C44H28N4)(C6H6N2O2)2]Cl·CH2Cl2. The CoIII ion lies on an inversion centre and is octa­hedrally coordinated by two N atoms of the NH2 groups of the two 4-nitro­aniline trans-axial ligands and four pyrrole N atoms of the porphyrin. The asymmetric unit contains one half of the [CoIII(TPP)(4-nitro­aniline)2]+ ion complex, one chloride counter-ion (lying on a twofold rotation axis) and one half di­chloro­methane solvent mol­ecule, where the C atom lies on a twofold rotation axis. The average equatorial Co—N(pyrrole) distance (Co—Np) is 1.982 (2) Å and the axial Co—N(4-nitro­aniline) bond length is 2.006 (2) Å. The crystal packing is stabilized by an N—H⋯Cl hydrogen bond between the N atom of the amino group of the 4-nitro­aniline axial ligand and the chloride counter-ion. The supra­molecular architecture is further stabilized by weak C—H⋯π inter­actions.