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Crystal structure of 5-[4-(di-methyl-amino)-phen-yl]-3-(4-methyl-phen-yl)-4,5-di-hydro-1H-pyrazole-1-carbaldehyde.

ABSTRACT: The title compound, C19H21N3O, comprises a central pyrazole ring which is N-connected to an aldehyde group and C-connected twice to substituted benzene rings. The pyrazole ring is twisted on the C-C single bond, and the least-squares plane through this ring forms dihedral angles of 82.44 (5) and 4.52 (5)° with the (di-methyl-amino)-benzene and p-tolyl rings, respectively. In the crystal, weak C-H⋯O hydrogen bonds link mol-ecules into supra-molecular tubes along the b axis.

SUBMITTER: Adam F

PROVIDER: S-EPMC4719963 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Crystal structure of 5-(4-meth-oxy-phen-yl)-3-(4-methyl-phen-yl)-4,5-di-hydro-1H-pyrazole-1-carbaldehyde.

Project description:In the title compound, C18H18N2O2, the pyrazole ring has a twisted conformation on the CH-CH2 bond. The tolyl ring and the 4-meth-oxy-phenyl ring are inclined to the mean plane of the pyrazole ring by 4.40?(9) and 86.22?(9)°, respectively, while the two aromatic rings are inclined to one another by 88.75?(9)°. In the crystal, mol-ecules are linked via bifurcated C-H?(O,O) hydrogen bonds and C-H?? inter-actions, forming sheets lying parallel to the ab plane.

| S-EPMC4719996 | biostudies-literature

5-(2-Hy-droxy-phen-yl)-3-methyl-4,5-di-hydro-1H-pyrazole-1-carbaldehyde.

Project description:In the title compound, C(11)H(12)N(2)O(2), the dihydro-pyrazole and benzene rings are oriented at a dihedral angle of 68.35 (5)°. The dihydro-pyrazole ring is planar, with a mean deviation from the mean plane of 0.0409 Å. The crystal structure is stabilized by O-H⋯O and C-H⋯O hydrogen bonds.

| S-EPMC3008072 | 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.

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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.

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Crystal structure of 3-(thio-phen-2-yl)-5-p-tolyl-4,5-di-hydro-1H-pyrazole-1-carbo-thio-amide.

Project description:In the title compound, C15H15N3S2, the central pyrazole ring adopts a twisted conformation on the -CH-CH2- bond. Its mean plane makes dihedral angles of 7.19 (12) and 71.13 (11)° with those of the thio-phene and toluene rings, respectively. The carbothi-amide group [C(=S)-N] is inclined to the pyrazole ring mean plane by 16.8 (2)°. In the crystal, mol-ecules are linked by N-H⋯S hydrogen bonds, forming chains propagating along [010]. Within the chains, there are N-H⋯π inter-actions present. Between the chains there are weak parallel slipped π-π inter-actions involving inversion-related thio-phene and pyrazole rings [inter-centroid distance = 3.7516 (14) Å; inter-planar distance = 3.5987 (10) Å; slippage = 1.06 Å].

| S-EPMC4518985 | biostudies-literature

3-(4-Amino-phen-yl)-5-(4-meth-oxy-phen-yl)-4,5-di-hydro-1H-pyrazole-1-carbo-thio-amide.

Project description:In the mol-ecule of title pyrazoline derivative, C17H18N4OS, the pyrazole ring adopts an envelope conformation with the flap atom, which bears the meth-oxy-phenyl substituent, displaced by 0.0750?(12)?Å from the plane through the other ring atoms. The two substituted benzene rings make a dihedral angle of 70.59?(6)°. The meth-oxy group is twisted slightly with respect to the attached benzene ring [Cmeth-yl-O-C-C torsion angle = -8.84?(15)°]. An intra-molecular N-H?N hydrogen bond occurs. In the crystal, the pyrazoline mol-ecules are linked by N-H?O and N-H?S hydrogen bonds into zigzag layers parallel to the bc plane and stacked along the a axis by ?-? inter-actions with centroid-centroid distances of 3.4690?(7) and 3.5792?(7)?Å. C-H?? inter-actions are also present.

| S-EPMC3793732 | biostudies-literature

Crystal structure and Hirshfeld surface analysis of 5-(3,5-di-tert-butyl-4-hy-droxy-phen-yl)-3-phenyl-4,5-di-hydro-1H-pyrazole-1-carboxamide.

Project description:In the title compound, C24H31N3O2, the mean plane of the central pyrazole ring [r.m.s. deviation = 0.095?Å] makes dihedral angles of 11.93?(9) and 84.53?(8)°, respectively, with the phenyl and benzene rings. There is a short intra-molecular N-H?N contact, which generates an S(5) ring motif. In the crystal, pairs of N-H?O hydrogen bonds link inversion-related mol-ecules into dimers, generating an R 2 2(8) ring motif. The Hirshfeld surface analysis indicates that the most significant contribution involves H?H contacts of 68.6.

| S-EPMC6775746 | biostudies-literature

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.

| S-EPMC3790397 | 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

Crystal structure of (4Z)-4-{[(2-chloro-phen-yl)amino](furan-2-yl)methyl-idene}-3-methyl-1-phenyl-4,5-di-hydro-1H-pyrazol-5-one.

Project description:In the title compound, C21H16ClN3O2, the pyrazolone ring and the O=C-C=C-N mean plane [maximum deviation = 0.022 (2) Å] are nearly coplanar, making a dihedral angle 4.56 (8)°, while the phenyl and pyrazole rings subtend a dihedral angle of 19.75 (8)°. The compound is in the enamine-keto form and its structure is stabilized by an intra-molecular N-H⋯O hydrogen bond. In the crystal, mol-ecules are linked via C-H⋯N hydrogen bonds, forming chains along [010]. Between the chains there are π-π inter-actions [inter-centroid distances = 3.3902 (9) and 3.5956 (11) Å], linking the chains to form sheets parallel to (10-1).

| S-EPMC4350689 | biostudies-literature

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