Diaqua(5,10,15,20-tetraphenylporphyrinato-κ4N)magnesium–18-crown-6 (1/1)

Abstract

In the title compound, [Mg(C44H28N4)(H2O)2]·C12H24O6, the MgII cation lies on an inversion center and is octahedrally coordinated by the four N atoms of the deprotonated tetraphenylporphyrin (TPP) ligand and by two water molecules. The asymmetric unit contains one half of the [Mg(TPP)(H2O)2] complex and one half of an 18-crown-6 molecule. The average equatorial magnesium–pyrrole N atom distance (Mg—Np) is 2.071 (1) Å and the axial Mg—O(H2O) bond length is 2.213 (1) Å. The crystal packing is stabilized by two O—H...O hydrogen bonds between coordinating water molecules and adjacent 18-crown-6 molecules, and exhibits a one-dimensional supramolecular structure along the a axis. The supramolecular architecture is futher stabilized by weak C—H...π interactions. The 18-crown-6 molecule is disordered over two sets of sites with an occupancy ratio of 0.8:0.2.