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In the title compound, C16H8F6N2, the dihedral angle between the pyrazole and di­fluoro­benzene rings is 50.30 (13)°, while those between the pyrazole and fluoro­benzene rings and between the di­fluoro­benzene and fluoro­benzene rings are 38.56 (13) and 53.50 (11)°, respectively. Aromatic π–π stacking inter­actions between adjacent di­fluoro­benzene rings [centroid–centroid separation = 3.6082 (11) Å] link the mol­ecules into dimers parallel to [21-2].

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In the title compound, C15H12Cl2N2O, the atoms not making up the chloro­benzene ring are approximately coplanar (r.m.s. deviation = 0.073 Å). The dihedral angle between these 13 atoms and the chloro­benzene ring is 67.37 (10)°. The C=O and Csp2—Cl groups are almost eclipsed [Cl—C—C=O = −6.5 (3)°]. In the crystal, C(6) chains linked by C—H...O hydrogen bonds result in [100] chains.

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The title compound, C10H9NO2, is almost planar (r.m.s. deviation for the non-H atoms = 0.027 Å) and the conformation across the C=N bond is syn. Further, the O atom of the benzo­furan ring is syn to the CH3 group in the side chain. In the crystal, mol­ecules are linked into C(3) chains propagating in [010] by O—H...N hydrogen bonds.

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In the title compound, C14H11FO2, the two benzene rings are not coplanar, with a dihedral angle of 57.45 (12)° between their planes. In the crystal, mol­ecules are linked by an O—H...O hydrogen bond, forming a 21 helical chain along the b axis.

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In the title compound, C10H9NO3, the dihedral angle between the benzo­furan ring system (r.m.s. deviation for the non-H atoms = 0.009 Å) and the –C—C(O)—N– segment is 83.76 (1)°. In the crystal, mol­ecules are linked by N—H...O and O—H...O hydrogen bonds, generating (001) sheets, which feature C(4) and C(10) chains.
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