The title molecule, C18H18N2O2, is V-shaped with the pyrazoline moiety being inclined to the adjacent phenyl ring by an angle of 6.49 (9)°, while the 4-methoxy-substituted ring is inclined to the pyrazoline ring by 82.99 (9)°. In the crystal, adjacent molecules are linked by C—H⋯O interactions, forming chains propagating in . There are also C—H⋯π interactions involving adjacent molecules and those related by an inversion center.
The crystal structure of the title compound, C23H28N2O2, is composed of discrete molecules with bond lengths and angles quite typical for pyrazoline derivatives of this class. The plane containing the pyrazoline unit is nearly planar with the mean plane of the phenyl ring at the 3-position, making a dihedral angle of 1.96 (3)°. The crystal packing is stabilized by weak C—H⋯π interactions involving both of the aromatic rings.
The asymmetric unit of the title compound, C17H17NO2, contains two crystallographically independent molecules. Both molecules adopt a trans configuration about the C=C bond, with the C—C=C—C fragments in the two molecules twisted in opposite directions [torsion angles of 174.2 (2) and −175.8 (2)°]. The two benzene rings in each of the molecules make dihedral angles of 20.21 (6) and 48.64 (4)°. In the crystal, adjacent molecules are linked by O—H⋯O hydrogen bonds into infinite polymeric chains.
In the title compound, C7H6N2O3, the planes containing the CNO and ONO atoms subtend dihedral angles of 5.47 (5) and 8.31 (5)°, respectively, with the benzene ring. In the crystal structure, intermolecular O—H⋯N hydrogen bonds link the molecules into centrosymmetric dimers with an R
2(6) graph-set motif.
The title compound, C14H20O3, is a synthetic analogue with a long aliphatic side chain of the important food additive and flavoring agent, vanillin. There are two independent molecules in the asymmetric unit, each having an essentially planar conformation (r.m.s. deviations of 0.023 and 0.051Å for all non–H atoms of the two molecules in the asymmetric unit).
The title compound, C20H22O2, crystallizes with two independent molecules in the asymmetric unit. In each molecule, all the non-H atoms lie in a common plane (r.m.s. deviations of 0.098 and 0.079 Å). There is a π–π stacking interaction in the crystal structure. The central aromatic rings of the two molecules, which are stacked head-to-tail one above the other, are separated by centroid-to-centroid distances of 3.872 (13) and 3.999 (10) Å.
The title compound, C22H18N2O2, was derived from 1-(2-hydroxyphenyl)-3-(4-methoxyphenyl)propane-1,3-dione. The central pyrazole ring forms dihedral angles of 16.83 (5), 48.97 (4) and 51.68 (4)°, respectively, with the methoxyphenyl, phenyl and hydroxyphenyl rings. The crystal packing is stabilized by O—H⋯N hydrogen bonding.
The title compound, C23H23BrO4, is an intermediate in the synthesis of fused heterocycles. In the title molecule, the cyclohexene ring has a distorted half-chair conformation. The bromophenyl ring and the mean plane of the cyclohexene ring form a dihedral angle of 13.8 (3)°, whereas the benzene and cyclohexene rings are approximately perpendicular [88.44 (17)°]. There are only weak C—H⋯O and C—H⋯π intermolecular interactions.
The title compound, C21H16N2O2, was derived from 1-(2-hydroxyphenyl)-3-(-methoxyphenyl)propane-1,3-dione. The molecular structure of the title compound is stabilized by an intramolecular O—H⋯N hydrogen bond. The dihedral angle between the hydroxyphenyl ring involved in this intramolecular hydrogen bond and the pyrazole ring is significantly smaller [10.07 (6)°] than the dihedral angle between the pyrazole and the other hydroxyphenyl ring [36.64 (5)°]. The benzene ring makes a dihedral angle of 54.95 (3)° with the pyrazole ring. The crystal packing is stabilized by O—H⋯O and O—H⋯N hydrogen bonds.
The title compound, C21H22O5, was prepared by NaOH-catalysed cyclocondensation of 3-(4-ethoxyphenyl)-1-(furan-2-yl)prop-2-en-1-one with ethyl acetoacetate. In the crystal, C—H⋯O and C—H⋯π interactions link the molecules. In the title molecule, the furan and cyclohexene rings are almost parallel [6.77 (11)°] and the cyclohexene ring is approximately perpendicular to the benzene ring [84.79 (5)°].
The title compound, C12H14O4, is an important intermediate in the synthesis of biologically active heterocyclic compounds. In the crystal structure, intermolecular O—H⋯O and C—H⋯O hydrogen bonds link the molecules. There are also C—H⋯π contacts between the benzene ring and the methylene groups.
The title compound, C16H14N2O2, was derived from 1-(2-hydroxyphenyl)-3-(2-methoxyphenyl)propane-1,3-dione. The molecule is essentially planar (r.m.s. deviation for all non-H atoms = 0.089 Å). Two intramolecular hydrogen bonds stabilize the molecular conformation and one N—H⋯O hydrogen bond stabilizes the crystal structure.
The title compound, C21H16N2O2, was derived from 1-(2-hydroxyphenyl)-3-(4-methoxyphenyl)propane-1,3-dione. The pyrazole ring and one of the hydroxy-substituted benzene rings are approximately coplanar, forming a dihedral angle of 7.5 (3)°. The relative conformation of these rings may be influenced by an intramolecular O—H⋯N hydrogen bond. In the crystal structure, intermolecular O—H⋯O hydrogen bonds involving different hydroxy groups of symmetry-related molecules form extended chains along .