metal-organic compounds
Open access
In the title complex, [Mg(C44H28N4)(C6H4N2)(H2O)], the Mg2+ 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—Hπ interactions.
metal-organic compounds
Open access
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—HO 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—Hπ interactions. The 18-crown-6 molecule is disordered over two sets of sites with an occupancy ratio of 0.8:0.2.