Bis[3-methyl-5-(pyridin-2-yl)-1H-pyrazol-4-yl] selenide methanol hemisolvate

The asymmetric unit of the title compound, C₁₈H₁₆N₆Se·0.5CH₃OH, contains two independent mol­ecules of bis­[3-methyl-5-(pyridin-2-yl)-1H-pyrazol-4-yl] selenide with similar C—Se—C bond angles [99.30 (14) and 98.26 (13)°], and a methanol molecule of solvation. In one mol­ecule, the dihedral angles between pyrazole and neighbouring pyridine rings are 18.3 (2) and 15.8 (2)°, and the corresponding angles in the other mol­ecule are 13.5 (2) and 8.3 (2)°. In the crystal, the selenide and solvent mol­ecules are linked by classical O—H...N and N—H...N hydrogen bonds, as well as by weak C—H...O and C—H...π inter­actions, forming a three-dimensional supra­molecular architecture.

Crystal structure of meso-tetra­kis­(4-nitro­phen­yl)porphyrin nitro­benzene disolvate

The porphyrin core of the title centrosymmetric compound, C₄₄H₂₆N₈O₈·2C₆H₅NO₂, is approximately planar, the maximum deviation being 0.069 (3) Å. The planes of the benzene rings of the nitro­phenyl substituents are almost perpendicular to the porphyrin mean plane, making dihedral angles of 73.89 (9) and 89.24 (9)°. The two pyrrole ring H atoms are equally disordered over the four pyrrole ring N atoms. In the crystal, weak C—H...O and C—H...N hydrogen bonds link the porphyrin mol­ecules into a three-dimensional supra­molecular network. The nitro­benzene solvent mol­ecules are linked by weak C—H...O hydrogen bonds into supra­molecular chains propagating along the a-axis direction.