Aqua­(4-cyano­pyridine-κN (4))(5,10,15,20-tetra­phenyl­porphyrinato-κ(4) N)magnesium

In the title complex, [Mg(C(44)H(28)N(4))(C(6)H(4)N(2))(H(2)O)], the Mg(2+) cation is octa­hedrally coordinated and lies on an inversion center with the axially located 4-cyano­pyridine and aqua ligands exhibiting 50% substitutional disorder. The cyano-bound 4-cyano­pyridine mol­ecule also is disordered across the inversion centre. The four N atoms of the pyrrole rings of the dianionic 5,10,15,20-tetra­phenyl­porphyrin ligand occupy the equatorial sites of the octa­hedron [Mg—N = 2.0552 (10) and 2.0678 (11) Å] and the axial Mg—(N,O) bond length is 2.3798 (12) Å. The crystal packing is stabilized by weak inter­molecular C—H⋯π inter­actions.