organic compounds
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In the title compound, C13H11ClO2, the dihedral angle between the mean planes of the 2-chlorophenyl and phenol rings is 87.4 (9)°. The methyl hydroxy group lies nearly perpendicular to the plane of its attached benzene ring [O—C—C—C torsion angle = 84.3 (3)°]. The two hydroxy groups lie on the same side of the molecule and are in a slightly twisted gauche conformation [O—C—C—O torsion angle = 77.1 (8)°] to each other. In the crystal, O—HO hydrogen bonds between nearby methylhydroxy groups form dimers in alternating pairs aligned diagonally along the b axis. A view along the c axis reveals a hexameric aggregate mediated by a ring of six O—HO hydrogen bonds generating an R66(12) motif loop.
organic compounds
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In the dication of the title salt, C16H21ClN2O2+·2C6H2N3O7− [systematic name: 2-{(4-chlorophenyl)[2-(dimethylazaniumyl)ethoxy]methyl}pyridinium bis(2,4,6-trinitrophenolate), contains a carbinoxaminium dication and two picrate anions, which are held together through intermolecular N—HO hydrogen bonds. In the dication, the two aromatic rings form a dihedral angle of 80.1 (1)°. In the two independent picrate anions, the nitro groups are twisted from the benzene plane, the largest dihedral angle in each ion being 42.8 (1) and 81.1 (5)°. In the crystal, in addition to the classical N—HO hydrogen bonds, weak C—HO hydrogen bonds and π–π interactions between the aromatic rings of the anions [centroid–centroid distances of 3.5768 (15) and 3.7436 (15) Å] help to establish the packing.
organic compounds
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In the title compound, C11H15N3O2S, the dihedral angle between the mean planes of the benzene ring and hydrazinecarbothioamide group is 9.2 (1)°. An intramolecular O—HN hydrogen bond is observed, serving to maintain an approximately planar conformation for the molecule. In the crystal, inversion dimers linked by C—HO interactions occur. Further C—HO contacts link dimers into (010) chains.
organic compounds
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In the cation of the title salt {systematic name: 4-[bis(4-fluorophenyl)methyl]-1-[(2E)-3-phenylprop-2-en-1-yl]piperazin-1-ium hydrogen maleate}, C26H27F2N2+·C4H3O4−, the protonated piperazine ring is in a chair conformation. The dihedral angle between the 4-fluorophenyl rings is 68.2 (2)°. An intramolecular O—HO hydrogen bond occurs in the anion. In the crystal, N—HO, C—HO and C—HF interactions are observed, which link the ions into [001] chains.
organic compounds
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The 12-membered cyclopenta[b]indole ring system in the title compound, C13H13NO2, deviates only slightly from planarity (r.m.s. deviation = 0.051 Å). In the crystal, N—HO and O—HO hydrogen bonds link the molecules into sheets parallel to (100). The five-membered cyclopentanone ring is in slightly distorted envelope conformation with the C atom bearing the hydroxy substituent as the flap.