Aqua­(5,10,15,20-tetra­phenyl­porphyrin­ato-κ⁴N)cadmium(II)–18-crown-6 (1/1)

The title compound, [Cd(C₄₄H₂₈N₄)(H₂O)]·(C₁₂H₂₄O₆), was made by the reaction of the [Cd(TPP)] with an excess of 18-crown-6 in chloro­benzene (where TPP is tetra­phenyl­porphyrinate). The Cd^II cation is chelated by a TPP anion and coordinated by a water mol­ecule in a distorted N₄O square-pyramidal geometry, the Cd^II cation being displaced by 0.7533 (9) Å from the mean plane of four N atoms of TPP anion. The porphyrin core presents a significant distortion, the maximum atomic deviation from the 24-atom mean plane is 0.1517 (2) Å. The 18-crown-6 mol­ecule is linked with the Cd^II complex via classical O—H...O hydrogen bonds. In the crystal, weak C—H...π inter­actions link the complex and 18-crown-6 mol­ecules into a three-dimensional supra­molecular architecture.