9-(2-Chloro­benzyl­idene)anthracen-10(9H)-one

In the title compound, C₂₁H₁₃ClO, the central anthracene system is distorted towards a boat conformation and the outer rings are not coplanar with the central ring [dihedral angles = 7.79 (1) and 11.90 (1)°]. The crystal structure features inversion dimers with graph-set motif R₂²(18) formed by C—H...O inter­actions.

4-(4-Fluoro­phen­yl)-6-methyl­amino-5-nitro-2-phenyl-4H-pyran-3-carbo­nitrile

In the title compound, C₁₉H₁₄FN₃O₃, the central pyran ring adopts a boat conformation with the O atom and the quaternary C atom diagonally opposite displaced by 0.068 (1) and 0.075 (1) Å, respectively, above the mean plane defined by the other four ring atoms. The co-planar atoms of the pyran ring and the fluoro­phenyl ring are nearly perpendicular, as evidenced by the dihedral angle of 87.11 (1)°. The amine group forms an intra­molecular N—H...O(nitro) hydrogen bond. In the crystal, mol­ecules are linked into parallel chains along [100] by weak N—H...N and C—H...N(nitro) hydrogen bonds, generating C(8) and C(9) graph-set motifs, respectively.