research communications
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The title compound has an E conformation about the azobenzene linkage and the benzene rings are almost coplanar to one another [dihedral angle = 1.36 (7)°]. In the crystal, a combination of O—HO and C—HO hydrogen bonds and C—Hπ interactions leads to the formation of slabs parallel to (001).
organic compounds
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In the title compound, C24H23NO2, a whole molecule is disordered over two sets of sites with occupancies in a ratio of 0.692 (6):0.308 (6). In the major disorder component, the naphthalene ring system forms a dihedral angle of 68.6 (5)° with the benzene ring. The corresponding angle in the minor component is 81.6 (10)°. In the crystal, molecules are linked into chains propagating along the b-axis direction via weak C—HO hydrogen bonds. The crystal packing is further consolidated by weak C—Hπ interactions.
organic compounds
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The asymmetric unit of the title compound, C17H18O3, comprises three independent molecules with similar geometries. In each molecule, the carbonyl group is twisted away from the napthalene ring system, making dihedral angles of 1.0 (2), 1.05 (19)° and 1.5 (2)°. The butene group in all three molecules are disordered over two sets of sites, with a refined occupancy ratio of 0.664 (6):0.336 (6). In the crystal, molecules are oriented with respect to their carbonyl groups, forming head-to-head dimers via O—HO hydrogen bonds. Adjacent dimers are further interconnected by C—HO hydrogen bonds into chains along the a-axis direction. The crystal structure is further stabilized by weak C—Hπ interactions.