Di-μ-azido-bis­(μ-1,4,7,10,13,16-hexa­oxacyclo­octa­deca­ne)bis­(5,10,15,20-tetra­phenyl­porphyrinato)dicadmium­disodium

The asymmetric unit of the title compound, [Cd₂Na₂(N₃)₂(C₄₄H₂₈N₄)₂(C₁₂H₂₄O₆)₂], consists of one half of the dimeric complex; the tetra­nuclear mol­ecule lies about an inversion centre. The Cd^II atom is coordinated by the four pyrrole N atoms of the 5,10,15,20-tetra­phenyl­porphyrinate ligand and one N atom of the axial azide ligand in a square-pyramidal geometry. The azide group is also linked to the Na^I atom, which is surrounded by one 18-crown-6 molecule and additionally bonded to a second 18-crown-6 molecule trans to the azide group. The porphyrin core exhibits a major doming distortion (∼40%) and the crystal structure is stabilized by weak C—H...π inter­actions. The mol­ecular structure features weak intra­molecular hydrogen bonds: two O—H...O inter­actions within the 18-crown-6 mol­ecule and one C—H(18-crown-6)...N(azido) contact.