organic compounds
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In the title salt, C18H24NO+·C6H7O7−, the dihedral angle between the benzene rings in the cation is 74.2 (5)°. In the crystal, anion–anion O—HO hydrogen bonds and weak O—HO interactions form infinite chains along [100]. Between these chains, cation–anion N—H—O hydrogen bonds are observed, forming an alternate pattern of cation and anion layers and leading to a two-dimensional network parallel to (100).
organic compounds
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Three independent molecules comprise the asymmetric unit of the title compound, C10H19N5O2, (systematic name: 4-amino-N-tert-butyl-3-isopropyl-5-oxo-4,5-dihydro-1H-1,2,4-triazole-1-carboxamide) . In all three molecules, the triazole ring and the carboxamide group are almost coplanar [within 4.0–5.9 (9)°], particularly because of the formation of an intramolecular N—HO hydrogen bond. On other hand, the orientation of the isopropyl group varies significantly from molecule to molecule. The crystal packing is dominated by N—HO and N—HN hydrogen bonds, which connect the molecules into infinite chains along [010].
organic compounds
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In the title compound, C17H16O4, the dihedral angle between the benzene rings is 4.4 (2)°. In the crystal, weak C—HO hydrogen bonds connect molecules along [001].
organic compounds
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In the title salt, C14H20NO+·Cl−, the piperidine ring adopts a chair conformation. In the crystal, the cations and anions are linked by classical N—HCl hydrogen bond and weak C—HCl and C—HO hydrogen bonds; the C—HO hydrogen bonds exhibit R22(14) ring motifs while the C—HCl hydrogen bonds link the molecules into chains along the a-axis direction. π–π stacking is observed between parallel phenyl rings of adjacent cations, the centroid–centroid distance being 3.8164 (15) Å.