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5-Hy-droxy-3-phenyl-5-trifluoro-meth-yl-4,5-dihydro-1H-pyrazole.

ABSTRACT: The five-membered dihydro-pyrazole ring in the title compound, C(10)H(9)F(3)N(2)O, is approximately planar (r.m.s. deviation 0.111 Å for all non-H atoms) and its phenyl substituent is aligned at an angle of 14.7 (2)°. Adjacent mol-ecules are linked by N-H⋯O and O-H⋯N hydrogen bonds, generating ribbons running along the b axis of the monoclinic unit cell.

SUBMITTER: Asiri AM

PROVIDER: S-EPMC3200976 | biostudies-literature |

REPOSITORIES: biostudies-literature

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

Project description:In the title compound, C(23)H(22)N(2)O(2), the central pyrazole ring is nearly planar (r.m.s. deviation = 0.046 Å) and it makes a dihedral angle of 18.5 (2)° with the phenyl ring. The dihedral angles between the phenyl and the two meth-oxy-substituted phenyl rings are 26.2 (2) and 80.6 (2)°. The crystal structure is stabilized by C-H⋯π stacking inter-actions and weak π-π inter-actions [centriod-centroid distance = 3.891 (2) Å].

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rac-(3S,4S)-3-Hy-droxy-4-phenyl-1-[(S)-(3-phenyl-4,5-dihydro-1,2-oxazol-5-yl)meth-yl]-4,5-dihydro-1H-1,5-benzo-diazepin-2(3H)-one.

Project description:In the title compound, C(25)H(23)N(3)O(3), the seven-membered diazepine ring adopts a boat conformation with the hydroxy-substituted C atom at the prow and fused-ring C atoms at the stern. The crystal packing features C-H?O, C-H?? and N-H ?? inter-actions.

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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.

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Project description:In the title compound, C(16)H(15)N(3)O(2)·H(2)O, the mean plane of the approximately planar pyrazole ring [maximum deviation = 0.0474?(18)?Å] makes dihedral angles of 86.32?(11) and 45.04?(10)° with the phenyl and pyridine rings, respectively. The dihedral angle between the phenyl and pyridine rings is 69.62?(11)°. In the crystal, inter-molecular O-H?O and O-H?N hydrogen bonds connect the components into chains along [010]. The crystal structure is further stabilized by ?-? stacking inter-actions with centroid-centroid distances of 3.7730?(12)?Å.

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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.

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

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2,2-Bis(hy-droxy-meth-yl)-2,3-dihydro-1H-pyrrolizin-1-one.

Project description:The title compound, C(9)H(11)NO(3), was prepared by an Aldol reaction of 2,3-dihydro-1H-pyrrolizin-1-one with formaldehyde. The asymmetric unit contains six mol-ecules. The pyrrolizine ring system in each mol-ecule is planar, the maximum atomic deviation being 0.066 (2) Å. In the crystal structure, mol-ecules are liked together by an extensive O-H⋯O hydrogen-bonding network.

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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.

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Tris(hy-droxy-meth-yl)methanaminium trifluoro-acetate.

Project description:In the crystal structure of the title salt, C(4)H(12)NO(3) (+)·C(2)F(3)O(2) (-), N-H?O and O-H?O hydrogen bonds link the ions, forming a complex three-dimensional network.

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5-Hy-droxy-3-methyl-5-phenyl-4,5-di-hydro-1H-pyrazole-1-carbothio-amide.

Project description:In the title compound C(11)H(13)N(3)OS, the aromatic ring and the dihydro-pyrazole ring are oriented orthogonally with respect to each other, making a dihedral angle of 89.92?(9)°. An intra-molecular O-H?S hydrogen bond occurs. In the crystal, weak N-H?N and N-H?S hydrogen bonds link the mol-ecules into a columnar stack propagating along the b axis.

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