2-Crotonoyl-5,8-dihydro-1-naphthol, (I), and 4-(1-Naphthoyl)-5,8-dihydro-1-naphthol, (II)

In (I), C₁₄H₁₄O₂, the dihydrobenzene ring adopts a flattened boat conformation and the hydroxyl group is involved in an O-H...O intramolecular hydrogen bond. In (II), C₂₁H₁₆O₂, the dihydronaphthalene ring system is planar and makes a dihedral angle of 70.06 (7)° with the naphthalene ring system; the hydroxyl group forms O—H...O intermolecular hydrogen bonds.

-1