Tetrakis(4-methoxycarbonylphenyl)porphyrin, or tetramethyl 4,4′,4″,4‴-porphyrin-5,10,15,20-tetrabenzoate, crystallizes as a nitrobenzene 1.9-solvate, C52H38N4O 8·1.9C6H5NO2, (I). The solvent molecules are contained in extended channels which propagate through the host lattice between parallel screw/ glide-related columns of offset-stacked porphyrin entities. Side packing of these columns involves π-π interactions between the methoxycarbonylphenyl residues. Molecules of the porphyrin host lie on crystallographic inversion centres. The zinc(II)-pyridine derivative pyridine(tetramethyl 4,4′,4″,4‴-porphyrin-5,10,15, 20-tetrabenzoato)zinc(II), [Zn(C52H36N4O 8)(C5H5N)], (II), is a square-pyramidal five-coordinate complex with pyridine as an apical ligand, which crystallizes as a chloroform-pyridine solvate. The metalloporphyrin-pyridine units form an open layered arrangement, occluding the non-coordinated solvent moieties within the intralayer interporphyrin voids. Within such arrays, the host porphyrin molecules are in contact with one another through the peripheral methoxycarbonyl substituents. The crystal packing consists of a bilayered arrangement of inversion-related porphyrin layers, with the axial ligands mutually penetrating into the voids of neighbouring arrays and tight offset stacking of these bilayers.
|Journal||Acta Crystallographica Section C: Crystal Structure Communications|
|State||Published - Apr 2006|