1-(4-Chloro­phenyl)-3-(4-hydroxy­phenyl)prop-2-en-1-one

In the title mol­ecule, C₁₅H₁₁ClO₂, the ketone group is in the s-cis conformation with respect to the olefinic double bond. The two aromatic rings form a dihedral angle of 26.07 (8)°. Screw-related mol­ecules are linked via O—H...O hydrogen bonds, forming a chain along the c axis. Weak C—H...O and C—H...Cl interactions interconnect the chains into a three-dimensional network.

3-(3-Hydro­xy­phenyl)-1-(4-methoxy­phenyl)­prop-2-en-1-one

The title compound, C₁₆H₁₄O₃, crystallizes in the triclinic system, with two independent mol­ecules in the asymmetric unit; these are related by a non-crystallographic twofold rotation axis. The two mol­ecules differ slightly in the relative orientation of the two aromatic rings. They are linked by C—H...π interactions to form a dimer and O—H...O hydrogen bonds link the dimers into chains along the c axis. C—H...π interactions interlink the chains into a three-dimensional network.