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organic compounds
The asymmetric unit of the title compound, C21H20N2S, comprises two independent molecules, which differ in the conformations of the cyclohexene and dihydropyrimidine rings, and in the orientations of the benzylidene moieties. The crystal structure is stabilized by weak N—H
S hydrogen bonds.
S hydrogen bonds. organic compounds
The title compound, C20H14N2OS, was synthesized by mixing imidazolidine-2-thione, ethyl chloroacetate and anthracene-10-carbaldehyde in ethanol. The dihedral angle between the anthracene plane and the heterocyclic ring system is 61.5 (3)°. In the crystal structure, the molecules are linked via weak C—HO interactions.
O interactions. organic compounds
The title compound, C15H5Cl4NO3, was synthesized from tetrachlorophthalic anhydride and 4-aminobenzaldehyde. In the molecule, the tetrachlorophthalimide unit is nearly planar and makes a dihedral angle of 56.20 (3)° with the benzene ring.
organic compounds
The title compound, C13H10N2O2, is approximately planar in the solid state and displays a trans configuration with respect to the azo double bond. Molecules form infinite chains linked by O—HO hydrogen bonds along the a axis.
O hydrogen bonds along the a axis. organic compounds
The title compound, C20H12N2OS, was synthesized by mixing 2,4-dichlorobenzaldehyde, ethyl chloroacetate and tetrahydropyrimidine-2-thione in ethanol. The dihedral angle between the naphthalene plane and the heterocyclic ring system is 9.3 (3)°.
organic compounds
The crystal structure of the title compound, C17H12N2O2·C10H8O, shows that the molecules are effectively planar in the solid state and the compound exists in the hydrazone form and not the azo form. The hydrazone H atom and carbonyl O atom are linked by an intramolecular N—HO hydrogen bond. The 2-naphthol molecules are disordered over inversion centres, the asymmetric unit containing half each of two such molecules. The packing can be described as a polymeric arrangement of molecules linked through O—HO hydrogen bonds.
O hydrogen bond. The 2-naphthol molecules are disordered over inversion centres, the asymmetric unit containing half each of two such molecules. The packing can be described as a polymeric arrangement of molecules linked through O—HO hydrogen bonds.
