organic compounds
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The title compound, C17H10O2, is nearly planar, the maximum atomic deviation being 0.053 (2) Å. In the molecule, an intramolecular O—HO hydrogen bond generates an S(6) ring motif. In the crystal, inversion-related molecules are linked by pairs of weak C—HO hydrogen bonds, forming dimers. π–π stacking is observed in the crystal structure, the closest centroid–centroid distance being 3.7846 (16) Å.
organic compounds
Open access
In the title compound, C13H11N3O2, an intramolecular O—HN hydrogen bond generates an S(7) ring. The dihedral angle between the mean plane of the benzene ring and the imidazolidinone ring is 3.05 (2)°. In the crystal, inversion-related molecules are linked by dual C—HOcarbonyl hydrogen bonds to form a dimer with an R22(14) graph-set motif. A C—HOhydroxy interaction links pairs of molecules into another type of cyclic dimer with an R22(18) motif. The molecules are further linked by C—HN interactions to form layers parallel to (001). Offset π–π stacking [3.3877 (8) Å] is observed in the crystal structure, with an interplanar spacing between the planes of neighboring benzene rings of 3.444 (1) Å.
organic compounds
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In the title compound, C17H14N2O2, the asymmetric unit comprises two molecules that are comformationally similar [the dihedral angles between the phenyl rings in each are 46.35 (2) and 48.04 (3)°], with the conformation stabilized by intramolecular O—HN hydrogen bonds, which generate S(7) rings. In the crystal, inversion-related molecules are linked by pairs of weak C—HO hydrogen bonds, forming dimers with an R22(16) graph-set motif. Weak inter-ring π–π stacking is observed in the structure, the shortest centroid-to-centroid distance being 3.7480 (13) Å.
organic compounds
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The title compound, C18H19N3O, displays an E conformation with respect to the C=N double bond. The dihedral angle between the mean planes of the two benzene rings is 24.49 (3)°. An intramolecular O—HN hydrogen bond generates an S(6) ring. In the crystal, molecules are linked by nonclassical intermolecular C—HO hydrogen bonds to form an infinite one-dimensional chain along [010], generating a C(8) motif.
organic compounds
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In the title compound, C10H5N3O2, the benzylidenemalononitrile unit is nearly planar, with a maximum deviation of 0.129 (2) Å for a terminal N atom; the nitro group is approximately coplanar with the benzene ring [dihedral angle = 8.8 (3)°]. An intramolecular C—HN hydrogen bond stabilizes the molecular conformation.