Crystal structure of 3-(4-methoxyphenyl)-2,3-dihydro-1H-naphtho[2,1-b]pyran-1-one

In the title compound, C20H16O3, the hydropyran ring adopts a distorted half-chair conformation with the methine C atom and the ring O atom displaced by −0.554 (2) and 0.158 (1) Å, respectively, from the plane of the other four atoms (r.m.s. deviation = 0.020 Å). Its mean plane (all atoms) is inclined to the naphthalene ring system at a dihedral angle of 11.67 (1)°. The dihedral angle between the napthalene ring system and the phenyl ring is 71.84 (1)°. In the crystal, no diectional interactions beyond van der Waals contacts could be identified

Crystal structure of (2E)-3-(3-ethoxy-4-hydroxyphenyl)-1-(4-hydroxyphenyl)prop-2-en-1-one

In the title compound, C17H16O4, the dihedral angle between the benzene rings is 21.22 (1)° and the mean plane of the prop-2-en-1-one group makes dihedral angles of 10.60 (1) and 11.28 (1)°, respectively, with those of the hydroxyphenyl and ethoxyphenyl rings. The ethoxy substituent forms a dihedral angle of 88.79 (2)° with the the prop-2-en-1-one group, which is found to be slightly twisted. In the crystal, phenolic O—H...O hydrogen bonds to the carbonyl O atom form a two-dimensional supramolecular network structure lying parallel to (010)