(IUCr) Crystallography Journals Online

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Acta Cryst. (2012). E68, m1557-m1558
[ doi:10.1107/S1600536812048052 ]

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

H. Toumi, N. Amiri, M. S. Belkhiria, J.-C. Daran and H. Nasri

Abstract: 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 [pi] interactions. The molecular structure features weak intramolecular hydrogen bonds: two O-HO interactions within the 18-crown-6 molecule and one C-H(18-crown-6)N(azido) contact.