(1E,4E)-1-(3-Nitro­phen­yl)-5-phenyl­penta-1,4-dien-3-one

In the title compound, C₁₇H₁₃NO₃, the dihedral angle between the benzene rings is 31.21 (5)°. In the crystal, inversion dimers linked by pairs of C—H...O hydrogen bonds occur. A C—H...π inter­action is also indicated.

1-(4,4′′-Difluoro-5′-meth­oxy-1,1′:3′,1′′-terphenyl-4′-yl)ethanone

In the title compound, C₂₁H₁₆F₂O₂, the central benzene ring is inclined at dihedral angles of 30.91 (8) and 46.88 (7)° to the two terminal fluoro-substituted rings. The dihedral angle between the two terminal fluoro-subsituted rings is 68.34 (8)°. An intra­molecular C—H...O hydrogen bond generates an S(6) ring motif. The crystal structure is stabilized by weak C—H...π inter­actions.

Ethyl 4,4′′-difluoro-5′-meth­oxy-1,1′:3′,1′′-terphenyl-4′-carboxyl­ate

In the title compound, C₂₂H₁₈F₂O₃, the two fluoro-substituted rings form dihedral angles of 25.89 (15) and 55.00 (12)° with the central benzene ring. The eth­oxy group in the mol­ecule is disordered over two positions with a site-occupancy ratio of 0.662 (7):0.338 (7). In the crystal, mol­ecules are linked by C—H...O hydrogen bonds into chains along the a axis. The crystal packing is further stabilized by C—H...π and π—π inter­actions, with centroid–centroid distances of 3.8605 (15) Å.