organic compounds
Open access
In the title compound, C15H14O4, the dihedral angle between the benzene rings is 67.18 (8)°. The Ca—Cm—O—Ca (a = aromatic and m = methylene) torsion angle is 172.6 (3)° and an intramolecular O—HO hydrogen bond generates an S(6) ring. In the crystal, molecules are linked by C—HO hydrogen bonds into zigzag chains propagating in [001] and C—Hπ interactions also occur.
organic compounds
Open access
The asymmetric unit of the title compound, C14H11NO5, contains two independent molecules in which the dihedral angles between the benzene rings are 89.27 (16) and 77.14 (12)°. In the crystal, molecules are linked by O—HO hydrogen bonds, generating C(8) chains propagating in [010] for one molecule and [001] C(8) chains for the other. The chains are connected by C—HO hydrogen bonds and π–π interactions [shortest centroid–centroid distance = 3.5908 (12)°], generating a three-dimensional network.