Tara Shahani

Tert-butyl 3-oxo-2,3,4,5,6,7-hexa­hydro-1H-pyrazolo[4,3-c]pyridine-5-carboxyl­ate

In the title compound, C11H17N3O3, the pyrazole ring is approximately planar, with a maximum deviation of 0.005 (2) Å, and forms a dihedral angle of 5.69 (13)° with the plane through the six atoms of the piperidine ring. In the crystal, pairs of intermolecular N—H⋯O hydrogen bonds form dimers with neighbouring molecules, generating R 2 2(8) ring motifs. These dimers are further linked into two-dimensional arrays parallel to the bc plane by intermolecular N—H⋯O and C—H⋯O hydrogen bonds.

5-Methoxy-methyl-4-phen-oxy-1H-pyrazol-3-ol.

In the title compound, C11H12N2O3, the pyrazole ring system is essentially planar [maximum deviation = 0.002 (2) Å] and forms a dihedral angle of 66.93 (9)° with the benzene ring. In the crystal packing, pairs of intermolecular N—H⋯O and O—H⋯N hydrogen bonds connect neighbouring molecules into dimers, generating R 2 2(10) and R 2 2(8) ring motifs, respectively. The crystal structure is further stabilized by C—H⋯π interactions.

(E)-1-(6-Chloro-2-methyl-4-phenyl-3-quinol­yl)-3-(2-methoxy­phen­yl)prop-2-en-1-one

In the title compound, C26H20ClNO2, the quinoline ring system and the methoxyphenyl ring form dihedral angles of 69.97 (6) and 22.10 (10)°, respectively, with the propenone linkage. The 4-phenyl ring substituent on the quinoline ring system is oriented at a dihedral angle of 66.47 (3)°. In the crystal, molecules exist as C—H⋯O hydrogen-bonded dimers. The structure is further stabilized by C—H⋯π interactions.

N-(4-Bromo-phen-yl)-2-(4-chloro-phen-yl)acetamide.

The title compound, C14H11BrClNO, consists of chlorobenzene and bromobenzene units which are linked at either end of the N-methylpropionamide group. The chlorobenzene unit [maximum deviation = 0.005 (4) Å] makes a dihedral angle of 68.21 (19)° with the bromobenzene unit [maximum deviation = 0.012 (3) Å]. In the crystal, N—H⋯O hydrogen bonds link the molecules into chains along [010].

2-(4-Chloro­phen­yl)-2-oxoethyl 4-hy­droxy­benzoate

The title compound, C15H11ClO4, consists of a chlorobenzene ring and a phenol ring which are linked together by a 1,4-dioxo-2-oxabutane-1,4-diyl group. The dihedral angle between the chlorobenzene and phenol rings is 65.70 (11)°. In the crystal, intermolecular O—H⋯O hydrogen bonds link the molecules into chains along [010].

5-Ethyl-4-methyl-1H-pyrazol-3(2H)-one.

In the title compound, C6H10N2O, the 2,3-dihydro-1H-pyrazole ring is approximately planar, with a maximum deviation of 0.013 (1) Å. Pairs of intermolecular N—H⋯O hydrogen bonds link neighboring molecules into dimers, generating R 2 2(8) ring motifs. These dimers are further linked into two-dimensional arrays parallel to the bc plane by intermolecular N—H⋯O hydrogen bonds. The crystal structure is further stabilized by C—H⋯π interactions.

5-Pentyl-4-phenyl­sulfonyl-1H-pyrazol-3-ol

In the title compound, C14H18N2O3S, the 1H-pyrazole ring is approximately planar, with a maximum deviation of 0.005 (1) Å. The dihedral angle formed between the 1H-pyrazole and phenyl rings is 79.09 (5)°. Pairs of intermolecular N—H⋯O and O⋯H⋯N hydrogen bonds form dimers between neighboring molecules, generating R 2 2(10) ring motifs. These dimers are further linked by intermolecular N—H⋯O and O—H⋯N hydrogen bonds into two-dimensional arrays parallel to the ac plane. The crystal structure is also stabilized by C—H⋯π interactions.

4-Methyl-5-phenyl-1H-pyrazol-3-ol.

The title compound, C10H10N2O, crystallizes with two independent molecules in the asymmetric unit, having closely comparable geometries. The dihedral angles between the 1H-pyrazole and benzene rings in the two molecules are 39.57 (14) and 41.95 (13)°. The two molecules are each connected to neighbouring molecules by pairs of intermolecular O—H⋯N hydrogen bonds, forming dimers with R 2 2(8) ring motifs. These dimers are further linked into R 4 4(10) ring motifs by intermolecular N—H⋯O hydrogen bonds, forming chains along [101]. The crystal structure is further stabilized by a C—H⋯π interaction.

N-(5-Bromo-pyridin-2-yl)acetamide.

The asymmetric unit of the title compound, C7H7BrN2O, contains two molecules, in one of which the methyl H atoms are disorderd over two orientations in a 0.57 (3):0.43 (3) ratio. The dihedral angles between the pyridine rings and the acetamide groups are 7.27 (11) and 8.46 (11)°. In the crystal, molecules are linked by N—H⋯O and C—H⋯O hydrogen bonds generating bifurcated R 2 1(5) ring motifs, which in turn lead to [110] chains.

(2E)-3-(3-Bromo-4-meth­oxy­phen­yl)-1-(4,4′′-difluoro-5′-meth­oxy-1,1′:3′,1′′-terphenyl-4′-yl)prop-2-en-1-one

In the title compound, C29H21BrF2O3, the dihedral angles between the central anisole ring and the pendant fluorobenzene rings are 48.86 (19) and 31.89 (18)°. The dihedral angle between the anisole ring and the 1-bromo-2-methoxybenzene ring linked via the enone bridge is 82.95 (17)°. In the crystal, C—H⋯O hydrogen bonds link the molecules into C(11) chains propagating along [010].