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The molecule of the title heteroaryl chalcone derivative, C13H11NOS, exists in a trans-configuaration and is almost planar with a dihedral angle of 3.73 (8)° between the phenyl and thiophene rings. An intramolecular N—H
O hydrogen bond generates an S(6) ring motif. In the crystal, two adjacent molecules are linked into a dimer in an anti-parallel face-to-face manner by a pair of C—HO interactions. Neighboring dimers are further linked into chains along the c-axis direction by N—HN hydrogen bonds.
O hydrogen bond generates an S(6) ring motif. In the crystal, two adjacent molecules are linked into a dimer in an anti-parallel face-to-face manner by a pair of C—HO interactions. Neighboring dimers are further linked into chains along the c-axis direction by N—HN hydrogen bonds.organic compoundsOpen access
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In the title 3-cyanopyridine derivative, C21H19N3O4, the 3-cyano-substituted pyridine ring forms dihedral angles of 2.35 (5) and 41.60 (5)° with the unsubstituted pyridine and 2,4,5-trimethoxy-substituted benzene rings, respectively. The dihedral angle between the unsubstituted pyridine and benzene rings is 39.84 (5)°. The methoxy groups form Cmethyl—O—C—(C,N) torsion angles in the range 0.80 (15)–11.45 (15)°. In the crystal, molecules related by 21 screw axes are linked by weak C—HN hydrogen bonds along [010]. In addition, weak C—Hπ interactions and π–π stacking interactions between pyridine rings, with a centroid–centroid distance of 3.6448 (6) Å, are observed.
N hydrogen bonds along [010]. In addition, weak C—Hπ interactions and π–π stacking interactions between pyridine rings, with a centroid–centroid distance of 3.6448 (6) Å, are observed.organic compoundsOpen access
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In the title hydrated salt, C15H16NO2+·C6H4BrO3S−·H2O, the cation exists in an E conformation with respect to the ethenyl bond and is almost planar, with a dihedral angle of 2.62 (12)° between the planes of the pyridinium and benzene rings. The methoxy substituent deviates slightly from the plane of its attached benzene ring [Cmethyl—O—C—C torsion angle = −11.6 (6)°]. In the crystal, the cations, anion and water molecules are linked together into chains along [010] by O—HO hydrogen bonds and weak C—HO interactions. There is a short BrO contact [3.029 (2) Å]. The crystal structure also features C—Hπ interactions involving the benzene ring of the anion.
O hydrogen bonds and weak C—HO interactions. There is a short BrO contact [3.029 (2) Å]. The crystal structure also features C—Hπ interactions involving the benzene ring of the anion.
