organic compounds
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In the title compound, C20H14Cl2F3NO3, the trifluromethyl group is disordered over two sets of sites in a 0.784 (10):0.216 (10) ratio. The quinoline ring system is essentially planar with a maximum deviation of 0.058 (2) Å for the N atom and forms dihedral angles of 89.23 (11) and 8.13 (17)°, respectively with the mean planes of the benzene ring and the carboxylate group. In the crystal, pairs of weak C—HO and C—HF hydrogen bonds link molecules into centrosymmetric dimers. The crystal structure is further stabilized by weak π–π [centroid–centroid distance = 3.624 (2) Å] interactions.
organic compounds
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In the title compound, C20H22BrN5O2·2H2O, the Schiff base molecule exists in an E conformation with respect to the acyclic C=N bond. An S(6) ring motif is formed via an intramolecular O—HN hydrogen bond. The dihedral angle between the imidazo[1,2-a]pyridine system and the benzene ring is 84.62 (5)°. In the crystal, N—HO, O—HO, O—HN, C—HO and C—HBr hydrogen bonds link the molecules into a three-dimensional network. The crystal packing is further stabilized by C—Hπ and π–π interactions [centroid–centroid distance = 3.5365 (7) Å].
organic compounds
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The title compound, C17H16N2O3, has an E conformation about the azobenzene (–N=N–) linkage. The benzene rings are twisted slightly with respect to each other [6.79 (9)°], while the dihedral angle between the plane through the carboxy group and the attached benzene ring is 3.2 (2)°. In the crystal, molecules are oriented with the carboxy groups head-to-head, forming O—HO hydrogen-bonded inversion dimers. These dimers are connected by C—HO hydrogen-bonds into layers lying parallel to the (013) plane.
organic compounds
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In the title compound, C26H24N2O2, the benzimidazole ring system is almost planar [maximum displacement = 0.025 (1) Å] and makes dihedral angles of 80.48 (5) and 41.57 (5)° with the benzene rings, which are inclined to one another by 65.33 (6)°. In the crystal, molecules are linked via C—Hπ and weak π–π interactions [centroid–centroid distance = 3.8070 (7) Å and interplanar distance = 3.6160 (5) Å].