organic compounds
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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.
organic compounds
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The title compound, C14H16, was prepared through [2 + 2] cycloaddition of norbornadiene. There are two independent molecules in the asymmetric unit: each is centrosymmetric with the centroid of the four-membered ring located about an inversion center. Each molecule possesses an exo-trans-exo conformation.
organic compounds
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In the title compound, C11H10O3, the 1-indanone unit is essentially planar (r.m.s. deviation = 0.036 Å). In the crystal, molecules are linked by non-classical C—HO hydrogen bonds, forming a C(6) chain along [010].
organic compounds
Open access
The molecule of the title compound, C9H8O2, is essentially planar except for the methylene H atoms [maximum deviation = 0.028 (1) Å]. In the crystal, the molecules are linked by classical O—HO hydrogen bonds and weak C—HO interactions into chains along [110] and [1-10].