(2,5-Di-methyl-imidazole){ N, N', N'', N'''-[porphyrin-5,10,15,20-tetra-yltetra-(2,1-phenyl-ene)]tetra-kis(pyridine-3-carboxamide)}manganese(II) chloro-benzene disolvate

Abstract

In the title compound, [Mn(C₆₈H₄₄N₁₂O₄)(C₅H₈N₂)]·2C₆H₅Cl, the central Mn^II ion is coordinated by four pyrrole N atoms of the porphyrin core in the basal sites and one N atom of the 2,5-di-methyl-imidazole ligand in the apical site. Two chloro-benzene solvent mol-ecules are also present in the asymmetric unit. Due to the apical imidazole ligand, the Mn atom is displaced out of the 24-atom porphyrin mean plane by 0.66 Å. The average Mn-N_p (p = porphyrin) bond length is 2.143 (8) Å, and the axial Mn-N_Im (Im = 2,5-di-methyl-imidazole) bond length is 2.171 (8) Å. The structure displays inter-molecular and intra-molecular N-H⋯O, N-H⋯N, C-H⋯O and C-H⋯N hydrogen bonding. The crystal studied was refined as a two-component inversion twin.

Keywords: crystal structure; hydrogen bonds; porphyrin derivative.