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1-{3-(4-Chloro-phen-yl)-5-[4-(propan-2-yl)phen-yl]-4,5-di-hydro-1H-pyrazol-1-yl}ethanone.

ABSTRACT: In the title compound, C20H21ClN2O, the dihedral angles between the pyrazole ring (r.m.s. deviation = 0.049?Å) and the benzene and chloro-benzene rings are 84.65?(10) and 3.35?(10)°, respectively. In the crystal, inversion dimers linked by pairs of weak C-H?O inter-actions generate R 2 (2)(16) loops. Weak ?-? stacking inter-actions [centroid-centroid distance = 3.8490?(11)?Å] are also observed.

SUBMITTER: Narayana B

PROVIDER: S-EPMC4120582 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature

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1-{3-(4-Chloro-phen-yl)-5-[4-(propan-2-yl)phen-yl]-4,5-di-hydro-1H-pyrazol-1-yl}ethanone.

Narayana B B Salian Vinutha V VV Sarojini Balladka K BK Jasinski Jerry P JP

Acta crystallographica. Section E, Structure reports online 20140614 Pt 7

In the title compound, C20H21ClN2O, the dihedral angles between the pyrazole ring (r.m.s. deviation = 0.049 Å) and the benzene and chloro-benzene rings are 84.65 (10) and 3.35 (10)°, respectively. In the crystal, inversion dimers linked by pairs of weak C-H⋯O inter-actions generate R 2 (2)(16) loops. Weak π-π stacking inter-actions [centroid-centroid distance = 3.8490 (11) Å] are also observed. ...[more]

PMID: 25161567

Similar Datasets

1-{3-(4-Chloro-phen-yl)-5-[4-(propan-2-yl)phen-yl]-4,5-di-hydro-1H-pyrazol-1-yl}propan-1-one.

Project description:In the title compound, C21H23ClN2O, the dihedral angle between the benzene rings is 83.2?(6)°, while the mean plane of the pyrazole ring [r.m.s. deviation = 0.043?(1)?Å] makes dihedral angles of 3.4?(3) and 86.2?(1)° with the benzene rings. In the crystal, a pair of weak C-H?O inter-actions between the benzene ring and the propan-1-one group link the mol-ecules into an inversion dimer with an R 2 (2)(16) graph-set motif. In addition, a weak ?-? stacking inter-action [centroid-centroid distance = 3.959?(4)?Å] connects the dimers into a tape running along [201].

| S-EPMC4120579 | biostudies-literature

1-{3-(4-Chloro-phen-yl)-5-[4-(propan-2-yl)phen-yl]-4,5-di-hydro-1H-pyrazol-1-yl}butan-1-one.

Project description:In the title compound, C22H25ClN2O, the pyrazole ring exhibits an envelope conformation with the methine C atom as the flap. The benzene rings are twisted by 3.3?(5) and 84.6?(5)° from the pyrazole mean plane, and are inclined to each other by 81.4?(4)°. In the crystal, pairs of weak C-H?O hydrogen bonds form centrosymmetric dimers with an R 2 (2)(16) graph-set motif. C-H?? inter-actions link the dimers into columns propagating in [100].

| S-EPMC4120539 | biostudies-literature

1-[3,5-Bis(4-chloro-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]ethanone.

Project description:In the title compound, C(17)H(14)Cl(2)N(2)O, the dihedral angles between the pyrazole ring and the mean planes of the benzene and chloro-substituted benzene rings are 75.97?(1) and 16.63?(1)° respectively. In the crystal, two weak C-H?O inter-molecular hydrogen bonds and ?-? stacking inter-actions [centroid-centroid distances = 3.774?(4) and 3.716?(7)?Å] are observed.

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1-{3-(4-Methyl-phen-yl)-5-[5-(2-nitro-phen-yl)furan-2-yl]-4,5-di-hydro-1H-pyrazol-1-yl}ethanone.

Project description:In the title compound, C22H19N3O4, the dihedral angle between the furan and pyrazole rings is 82.73?(19)° while the dihedral angles between the furan and pyrazole rings and their attached benzene rings are 31.93?(18) and 1.88?(18)°, respectively. In the crystal, inversion dimers linked by pairs of C-H?O hydrogen bonds generate R 2 (2)(16) loops. In addition, weak C-H?? and aromatic ?-? stacking [minimum centroid-centroid distance = 3.5374?(17)?Å] inter-actions are observed.

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1-[5-(4-Chloro-phen-yl)-3-(4-hy-droxy-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]-ethanone.

Project description:In the title compound, C(17)H(15)ClN(2)O(2), the benzene rings form dihedral angles of 89.56?(5) and 5.87?(5)° with the mean plane of the pyrazoline ring (r.m.s. deviation = 0.084?Å). The dihedral angle between the two benzene rings is 87.57?(5)°. In the crystal, mol-ecules are linked by O-H?O and C-H?O hydrogen bonds into a helical chain along the c axis. Between the chains weak C-H?N and C-H?O inter-actions are present. The crystal studied was an inversion twin with a domain ratio of 0.72?(4):0.28?(4).

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1-[3-(4-Chloro-phen-yl)-5-(4-meth-oxy-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]ethanone.

Project description:In the title compound, C(18)H(17)ClN(2)O(2), the benzene rings form dihedral angles of 6.69 (6) and 74.88 (5)° with the 4,5-dihydro-1H-pyrazole ring. The benzene rings form a dihedral angle of 76.67 (5)° with each other. In the crystal, mol-ecules are linked via bifurcated (C,C)-H⋯O hydrogen bonds into chains along [010]. The crystal structure is further consolidated by C-H⋯π inter-actions.

| S-EPMC3343987 | biostudies-literature

Crystal structure of (4Z)-1-(3,4-di-chloro-phen-yl)-4-[hy-droxy(4-methyl-phen-yl)methyl-idene]-3-methyl-4,5-di-hydro-1H-pyrazol-5-one.

Project description:The title compound, C18H14Cl2N2O2, crystallizes with two mol-ecules, A and B, in the asymmetric unit. In mol-ecule A, the dihedral angles between the central pyrazole ring and pendant di-chloro-benzene and p-tolyl rings are 2.18?(16) and 46.78?(16)°, respectively. In mol-ecule B, the equivalent angles are 27.45?(16) and 40.45?(18)°, respectively. Each mol-ecule features an intra-molecular O-H?O hydrogen bond, which closes an S(6) ring and mol-ecule A also features a C-H?O inter-action. In the crystal, weak C-H?? interactions and aromatic ?-? stacking [shortest centroid-centroid separation = 3.707?(2)?Å] generate a three-dimensional network.

| S-EPMC4257223 | biostudies-literature

1-[3,5-Bis(4-fluoro-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]ethanone.

Project description:In the asymmetric unit of the title compound, C(17)H(14)F(2)N(2)O, there are three independent mol-ecules (A, B and C) which differ slightly in the relative orientations of the two fluoro-phenyl rings. In mol-ecules A and C one of the fluoro-phenyl rings is disordered over two positions, with occupancy ratios of 0.72 (2):0.28 (2) for mol-ecule A and 0.67 (2):0.33 (2) for mol-ecule C. The dihedral angle between the two fluoro-phenyl rings in the independent mol-ecules lie in the range 70.3 (3)-84.0 (3)°. In the crystal structure, the mol-ecules are linked via inter-molecular C-H⋯O and C-H⋯F hydrogen bonds and π⋯π stacking inter-actions [centroid-centroid distance = 3.7508 (13) Å], forming a three-dimensional network.

| S-EPMC2983722 | biostudies-literature

1-[3-(4-Fluoro-phen-yl)-5-phenyl-4,5-dihydro-1H-pyrazol-1-yl]ethanone.

Project description:In the title compound, C(17)H(15)FN(2)O, the pyrazoline ring adopts a flattened envelope conformation. The dihedral angle between the fluoro-substituted benzene ring and the phenyl ring is 69.20 (5)°. In the crystal, a pair of C-H⋯O hydrogen bonds link neighbouring mol-ecules, forming an inversion dimer. The crystal structure is further consolidated by C-H⋯π inter-actions and by a π-π inter-action with a centroid-centroid distance of 3.7379 (6) Å.

| S-EPMC3435661 | biostudies-literature

Crystal structure of 1-[2-(2,6-di-chloro-phen-yl)-4,5-diphenyl-1H-imidazol-1-yl]propan-2-ol.

Project description:The central imidazole ring of the title compound, C24H20Cl2N2O, is twisted with respect to with the planes of the 2,6-di-chloro-benzene and two phenyl rings, making dihedral angles of 74.06?(18), 28.52?(17) and 67.65?(18)°, respectively. The phenyl ring not adjacent to the N-bonded 2-hy-droxy-propyl group shows the greatest twist, presumably to minimize steric inter-actions. In the crystal, mol-ecules are linked by O-H?N and C-H?O hydrogen-bond contacts into chains along the a-axis direction. The series of parallel chains form a two-dimensional sheet approximately parallel to the bc diagonal. In addition, C-H?? inter-actions are observed between the sheets. The atoms of the 2-hy-droxy-propyl group and the N atom of the 1H-imidazole ring to which it is bonded are disordered over two sets of sites, with an occupancy ratio of 0.722?(5):0.278?(5). The structure was refined as an inversion twin.

| S-EPMC4420112 | biostudies-literature

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