organic compounds
Open access
In the title compound, C19H25NO2, the dihedral angle between the benzene rings is 53.15 (8)°. One of the –OH groups forms an intramolecular O—HN link, generating an S(6) ring. The other –OH group forms an intermolecular O—HN hydrogen bond in the crystal, generating centrosymmetric R22(20) loops.
organic compounds
Open access
The title compound, C17H21NO4, shows an intramolecular hydrogen bond between a phenol OH group and the N atom. In the crystal, molecules are connected by pairs of O—HO hydrogen bonds into inversion dimers.
organic compounds
Open access
The asymmetric unit of the title compound, 3C10H8N2·2C7H7NO2, consists of three molecules of 4,4′-bipyridine (bpy) and two molecules of 3-aminobenzoic acid (bza). Two molecules of bza and two molecules of bpy are connected via O—HN, N—HN and N—HO hydrogen bonds, forming forming infinite double-stranded zigzag chains along the c axis. The third molecule of bpy is linked to the chain by weak C—HO interactions. Adjacent chains are linked via π–π interactions [centroid–centroid distances = 3.759 (3)–3.928 (3) Å] involving the pyridine rings of bpy molecules, resulting in a sheet-like structure parallel to (100). These sheets are stacked via C—Hπ interactions, resulting finally in the formation of a three-dimensional supramolecular structure.