organic compounds
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The asymmetric unit of the title compound, C13H10F2N2O, contains one and a half N,N′-bis(4-fluorophenyl)urea molecules. One of the molecules has crystallographic twofold rotation symmetry. The benzene rings are twisted from each other by dihedral angles of 29.69 (6)° for the molecule in a general position and 89.83 (6)° for the symmetry-generated molecule. In the crystal structure, a pair of intermolecular N—HO hydrogen bonds link symmetry-related molecules into chains along the b axis, forming R21(6) ring motifs.
organic compounds
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The asymmetric unit of the title compound, C12H8N2·0.5C2H4N2S2, contains one 1,10-phenanthroline molecule and a half-molecule of dithiooxamide, which lies across a crystallographic inversion center. The 1,10-phenanthroline unit is not strictly planar, with dihedral angles between the central benzene ring and the pyridine rings of 1.42 (10) and 1.40 (10)°. In the crystal structure, two 1,10-phenanthroline molecules are linked together by one dithiooxamide via intermolecular N—HN hydrogen bonds.
organic compounds
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In the title compound, C27H20ClNO, the quinoline ring forms a dihedral angle of 62.53 (5)° with the substituent benzene ring. In the crystal, intermolecular C—HCl interactions link the molecules into chains along the b axis. Intermolecular C—HN and C—HO hydrogen bonds further consolidate the structure into a three-dimensional network. The unit cell contains four solvent-accessible voids, each with a volume of 35 Å3, but no significant electron density was found in them.
organic compounds
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The asymmetric unit of the title Schiff base compound, C12H15N3O, contains two crystallographically independent molecules, with both existing in an E configuration with respect to the C=N double bonds. In the crystal structure, intermolecular N—HN and C—HO hydrogen bonds link the molecules into a three-dimensional network.