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N'-[(Z)-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methyl-idene]-2-hy-droxy-benzohydrazide.

ABSTRACT: In the title compound, C(19)H(18)N(4)O(3), the pyrazole ring is oriented at dihedral angles of 41.12?(7) and 12.25?(10)°, respectively, with respect to the planes of the phenyl and benzene rings. Intra-molecular N-H?O and O-H?O hydrogen bonds generate seven- and six-membered S(7) and S(6) ring motifs, respectively.

SUBMITTER: Aslam M

PROVIDER: S-EPMC3275035 | biostudies-literature | 2012 Feb

REPOSITORIES: biostudies-literature

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N'-[(Z)-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)methyl-idene]-2-hy-droxy-benzohydrazide.

Aslam Muhammad M Anis Itrat I Afza Nighat N Ejaz Khan Islam Ullah IU Arshad Muhammad Nadeem MN

Acta crystallographica. Section E, Structure reports online 20120111 Pt 2

In the title compound, C(19)H(18)N(4)O(3), the pyrazole ring is oriented at dihedral angles of 41.12 (7) and 12.25 (10)°, respectively, with respect to the planes of the phenyl and benzene rings. Intra-molecular N-H⋯O and O-H⋯O hydrogen bonds generate seven- and six-membered S(7) and S(6) ring motifs, respectively. ...[more]

PMID: 22346980

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4-((E)-{2-[N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)carboximido-yl]benzyl-idene}amino)-1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-3-one.

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Project description:In the title compound, C19H17Cl2N3O2, the amide group is planar and, through N-H?O hydrogen bonding to an adjoining mol-ecule, forms dimers of the R2(2)(10) type. As a result of steric repulsion, the amide group is rotated with respect to both the dichloro-phenyl and 2,3-dihydro-1H-pyrazol-4-yl rings, making dihedral angles of 71.63?(11) and 57.93?(10)°, respectively. The dihedral angle between the dichloro-phenyl and 2,3-dihydro-1H-pyrazol-4-yl rings is 76.60?(10)° while that between the 2,3-dihydro-1H-pyrazol-4-yl and phenyl rings is 49.29?(7)°. The crystal structure also features weak C-H?O inter-actions.

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Project description:In the title compound, C19H17Cl2N3O2, there are three mol-ecules (A, B and C) in the asymmetric unit and each differs in the conformation adopted. As a result of steric repulsion, the amide group is rotated with respect to both the dichloro-phenyl and 2,3-dihydro-1H-pyrazol-4-yl rings, making dihedral angles of 44.5?(2) and 56.2?(2)°, respectively in A, 51.1?(2) and 54.1?(2)° in B, and 53.8?(2) and 54.6?(2)° in C. The dihedral angles between the dichloro-phenyl and 2,3-dihydro-1H-pyrazol-4-yl rings are 54.8?(2), 76.2?(2) and 77.5?(2)° in mol-ecules A, B and C, respectively, while the 2,3-dihydro-1H-pyrazol-4-yl and phenyl rings make dihedral angles of 45.3?(2), 51.2?(2) and 42.8?(2)°, respectively. In the crystal, two of the mol-ecules are linked through N-H?O hydrogen bonding to an adjoining mol-ecule, forming dimers of the R2(2)(10) type, while the third mol-ecule forms such dimers with itself. C-H?O inter-actions link the dimers.

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