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5-(2-Fur-yl)-3-methyl-1-(3-nitro-phen-yl)-4,5-dihydro-1H-pyrazole.

ABSTRACT: In the title compound, C(14)H(13)N(3)O(3), the pyrazoline ring assumes an envelope conformation with the furanyl-bearing C atom at the flap position. The dihedral angle between the furan and nitrobenzene rings is 84.40 (9)°. Weak inter-molecular C-H⋯O hydrogen bonding is present in the crystal structure.

SUBMITTER: Chen JQ

PROVIDER: S-EPMC2970096 | biostudies-literature |

REPOSITORIES: biostudies-literature

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3,5-Bis(4-fluoro-phen-yl)-1-(4-nitro-phen-yl)-4,5-dihydro-1H-pyrazole.

Project description:In the title compound, C(21)H(15)F(2)N(3)O(2), a pyrazole derivative bearing three aromatic substituents, the central five-membered heterocyclic ring makes dihedral angles of 1.77?(14), 3.68?(13) and 72.15?(14)° with the three benzene rings. In the crystal, C-H?O and C-H?F inter-actions connect the mol-ecules into double layers parallel to the bc plane.

| S-EPMC3515302 | biostudies-literature

3,5-Bis(4-methyl-phen-yl)-1-phenyl-4,5-dihydro-1H-pyrazole.

Project description:In the title compound, C(23)H(22)N(2), the dihedral angle between the methyl-benzene groups is 77.62 (6)°, and the dihedral angle between the envelope-shaped pyrazole ring [in which one C atom displaced by 0.109 (1) Å from the mean plane of the other four atoms] and the phenyl ring is 17.57 (7)°. The dihedral angles between the phenyl ring and the two methyl-benzene rings are 13.24 (6) and 81.02 (7)°. In the crystal, weak C-H⋯π inter-actions link the mol-ecules.

| S-EPMC3099927 | biostudies-literature

5-(Anthracen-9-yl)-3-(4-nitro-phen-yl)-1-phenyl-4,5-dihydro-1H-pyrazole.

Project description:In the title compound, C(29)H(21)N(3)O(2), the five-membered pyrazoline ring is nearly planar, the maximum deviation being 0.037 (3) Å. The anthracene ring system is approximately perpendicular to the central pyrazoline ring, making a dihedral angle of 86.55 (16)°, whereas the two attached benzene rings are oriented at smaller dihedral angles of 12.9 (2) and 14.7 (2)°with respect to the pyrazoline ring. An intra-molecular C-H⋯N hydrogen bond is observed.

| S-EPMC3009137 | biostudies-literature

3-Methyl-1-(3-nitro-phen-yl)-5-phenyl-4,5-dihydro-1H-pyrazole.

Project description:In the title compound, C(16)H(15)N(3)O(2), the planar [maximum deviation 0.156?(2)?Å] pyrazoline ring is nearly coplanar with the 3-nitro-phenyl group and is approximately perpendicular to the phenyl ring, making dihedral angles of 3.80?(8) and 80.58?(10)°, respectively. Weak inter-molecular C-H?O hydrogen bonding is present in the crystal structure.

| S-EPMC2970115 | biostudies-other

3-Methyl-4-[2-(4-nitro-phen-yl)hydrazin-1-yl-idene]-5-oxo-4,5-dihydro-1H-pyrazole-1-carbothio-amide.

Project description:The asymmetric unit of the title compound, C(11)H(10)N(6)O(3)S, contains two independent mol-ecules, each of which is stabilized by an intra-molecular N-H⋯O hydrogen bond, forming an S(6) ring motif. In one mol-ecule, the pyrazole ring forms a dihedral angle of 10.93 (14)° with the benzene ring. The corresponding dihedral angle in the other mol-ecule is 7.03 (14)°. In the crystal, mol-ecules are linked via pairs of (N,N)-H⋯O bifurcated acceptor bonds which, together with C-H⋯O hydrogen bonds, form sheets parallel to (001).

| S-EPMC3393969 | biostudies-literature

5-(4-Fluoro-phen-yl)-3-[5-methyl-1-(4-methyl-phen-yl)-1H-1,2,3-triazol-4-yl]-4,5-dihydro-1H-pyrazole-1-carbothio-amide.

Project description:In the title compound, C(20)H(19)FN(6)S, the pyrazole ring has an envelope conformation, with the methine C atom being the flap atom. The dihedral angle between the least-squares plane through the pyrazole and triazole rings is 7.59?(9)°, and the triazole and attached benzene ring form a dihedral angle of 74.79?(9)°. The thio-urea group is coplanar with the pyrazole ring [N-N-C-S torsion angle = -179.93?(11)°], which enables the formation of an intra-molecular N-H?N hydrogen bond. In the crystal, inversion-related mol-ecules associate via N-H?S hydrogen bonds and eight-membered {?HNCS}(2) synthons feature in the crystal packing. These synthons are connected into supra-molecular chains along the a axis via N-H?F hydrogen bonds, and the chains are consolidated into layers in the ab plane via C-H?S and C-H?F contacts.

| S-EPMC3379505 | biostudies-literature

3,5-Bis(4-fluoro-phen-yl)-1-phenyl-4,5-dihydro-1H-pyrazole.

Project description:In the title compound, C(21)H(16)F(2)N(2), the dihedral angle between the fluoro-phenyl groups is 66.34?(8)°, and the dihedral angle between the envelope-configured pyrazole group (N/N/C/C/C) and the benzene ring is 11.50?(9)°. The dihedral angles between the benzene and the two fluoro-substituted phenyl groups are 77.7?(6) and 16.7?(5)°. Weak C-H?? interactions contribute to the stability of the crystal structure.

| S-EPMC3007318 | biostudies-literature

3,5-Bis(4-fluoro-phen-yl)-4,5-dihydro-1H-pyrazole-1-carbaldehyde.

Project description:In the title mol-ecule, C(16)H(12)F(2)N(2)O, the pyrazole ring adopts a slight envelope conformation with the methyl-ene C atom deviating by 0.114?(3)?Å from the mean plane of the other four atoms [maximum deviation = 0.021?(3)?Å]. The dihedral angles between the four essentially planar atoms of the pyrazole ring and the fluoro-substituted benzene rings are 2.6?(2) and 82.2?(2)°. The dihedral angle between the two benzene rings is 83.7?(2)°. The crystal packing is stabilized by weak inter-molecular C-H?O hydrogen bonds.

| S-EPMC3120319 | biostudies-literature

5-(4-Bromo-phen-yl)-3-(4-fluoro-phen-yl)-1-phenyl-4,5-dihydro-1H-pyrazole.

Project description:In the title compound, C(21)H(16)BrFN(2), the fluoro-substituted benzene ring is disordered over two orientations about the C-F bond and the C-C bond between the benzene and pyrazole groups with a site-occupancy ratio of 0.516?(8):0.484?(8). The central pyrazole ring [maximum deviation = 0.035?(3)?Å] makes dihedral angles of 22.4?(2), 11.0?(2), 77.19?(16) and 7.44?(17)° with the two disorder components of the benzene ring, the bromo-substituted benzene ring and the phenyl ring, respectively. In the crystal, mol-ecules are linked into a layer parallel to the bc plane through C-H?? inter-actions.

| S-EPMC3435702 | biostudies-literature

1-(4-Methyl-phenyl-sulfon-yl)-5-phenyl-4,5-dihydro-1H-pyrazole.

Project description:The title compound, C(16)H(16)N(2)O(2)S, was synthesized by the reaction of 5-phenyl-4,5-dihydro-1H-pyrazole and 4-methyl-benzene-1-sulfonyl chloride. The five-membered pyrazoline ring is nearly planar, with a miximum deviation of 0.078?(2)?Å.

| S-EPMC3212292 | biostudies-literature

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