Crystal structure of 210,220-bis-(2,6-di-chloro-phen-yl)-4,7,12,15-tetra-oxa-2(5,15)-nickel(II)porpyhrina-1,3(1,2)-dibenzena-cyclo-hepta-deca-phane-9-yne di-chloro-methane monosolvate.

The asymmetric unit of the title compound, [Ni(C52H34Cl4N4O4)]·CH2Cl2, consists of two discrete complexes, which show significant differences in the conformation of the side chain. Each NiII cation is coordinated by four nitro-gen atoms of a porphyrin mol-ecule within a square-planar coordination environment. Weak intra-molecular C-H⋯Cl and C-H⋯O inter-actions stabilize the mol-ecular conformation. In the crystal structure, discrete complexes are linked by C-H⋯Cl hydrogen-bonding inter-actions. In addition, the two unique di-chloro-methane solvate mol-ecules (one being disordered) are hydrogen-bonded to the Cl atoms of the chloro-phenyl groups of the porphyrin mol-ecules, thus stabilizing the three-dimensional arrangement. The crystal exhibits pseudo-ortho-rhom-bic metrics, but structure refinements clearly show that the crystal system is monoclinic and that the crystal is twinned by pseudo-merohedry.