organic compounds
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In the title compound, C13H13NO3, the conformation across the C=C bond is synperiplanar, the torsion angle of the segment C(ring)—C=C—C(N) being 3.2 (5)°. In the crystal, molecules are linked into inversion dimers, arranged in a zigzag pattern, through two C—HO interactions generating R22(10) and R22(14) motifs. These dimers are arranged in a zigzag pattern in the crystal structure. The molecules are further linked along the c axis through weak C—Hπ interactions, and weak ππ interactions [centroid–centroid separation = 3.9986 (17) Å] are also observed.
organic compounds
Open access
In the title compound, C15H15NO4S, the dihedral angle between the benzene rings is 78.62 (16)°. In the crystal, adjacent molecules are linked along the c axis into C(4) chains through strong N—HO hydrogen bonds. Molecules are further connected through C—HO hydrogen bonds into a hexameric unit generating an R66(66) motif. Another C—HO interaction connects the molecules along the c axis, forming C(5) chains. A region of disordered electron density, most probably disordered methanol–water solvent molecules, was treated with the SQUEEZE routine in PLATON [Spek (2009). Acta Cryst. D65, 148–155]. The formula mass and unit-cell characteristics do not take into account this disordered solvent.
organic compounds
Open access
In the title compound, C10H5F5O2, the C=O bonds are syn to one another. In the crystal, molecules are linked into C(9) chains parallel to [101] through weak C—HO interactions, with the O atom adjacent to the –CF3 group acting as the acceptor.
organic compounds
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The title compound, C14H12ClNO4S, crystallizes with two molecules in the asymmetric unit. The dihedral angles between the benzene rings are 89.68 (1) (molecule 1) and 82.9 (1)° (molecule 2). In each molecule, intramolecular N—HO hydrogen bonds between the amide H atom and the methoxy O atom generate S(6) loops. In the crystal, molecule 2 is linked into inversion dimers through pairs of C—HO interactions, forming an R22(8) ring motif. Molecules 1 and 2 are further linked along the b-axis direction through C—Hπ interactions. The crystal structure is further stabilized by several π–π stacking interactions [centroid–centroid separations = 3.7793 (1), 3.6697 (1) and 3.6958 (1) Å], thus generating a three-dimensional architecture.
organic compounds
Open access
In the title compound, C15H13F3N2O2·H2O, the dihedral angle between the benzene and pyridine rings is 74.97 (1)°. The –CF3 group attached to the benzene ring is syn to the C=O bond in the adjacent side chain. In the crystal, molecules are linked to one another through the water molecules by strong N—HO, O—HO and O—HN hydrogen bonds, forming a ladder-type network. The benzamide molecules are also linked to one another through C—HF interactions, forming C(6) chains parallel to the b-axis direction. Aromatic π–π stacking interactions [centroid–centroid separations = 3.7150 (1) and 3.7857 (1) Å] between adjacent pairs of pyridine and benzene rings are also observed, resulting in a three-dimensional architecture are also observed.