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(E)-N'-[1-(2-Hydroxy-phen-yl)ethyl-idene]-3-methoxy-benzohydrazide.

ABSTRACT: In the title compound, C(16)H(16)N(2)O(3), the benzohydrazide group is not planar and the mol-ecule exists in a trans configuration with respect to the methyl-idene unit. The dihedral angle between the two substituted benzene rings is 26.9 (2)°. In the crystal structure, the mol-ecular packing is stabilized by intra-molecular O-H⋯N and inter-molecular N-H⋯O hydrogen bonds. The inter-molecular hydrogen bonding forms chains parallel to the b axis.

SUBMITTER: Li CM

PROVIDER: S-EPMC2968921 | biostudies-literature |

REPOSITORIES: biostudies-literature

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(E)-N'-[1-(4-Bromo-phen-yl)ethyl-idene]-2-hydroxy-benzohydrazide.

Project description:In the title compound, C(15)H(13)BrN(2)O(2), the two aromatic rings form a dihedral angle of 7.9?(1)° and an intra-molecular N-H?O hydrogen bond influences the mol-ecular conformation. In the crystal, inter-molecular O-H?O hydrogen bonds link the mol-ecules into chains propagated in [001]. The crystal packing exhibits also ?-? inter-actions, which pair mol-ecules into centrosymmetric dimers with short inter-molecular distances of 3.671?(4)?Å between the centroids of aromatic rings.

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Project description:In the title compound, C(15)H(13)ClN(2)O(2), the dihedral angle between the two benzene rings is 7.0?(1)°. An intra-molecular N-H?O hydrogen bond is present and inter-molecular O-H?O hydrogen bonds link the mol-ecules into chains along [001].

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N'-[(E)-1-(5-Bromo-2-hydroxy-phen-yl)ethyl-idene]benzohydrazide.

Project description:The C=N double bond in the title compound, C(15)H(13)BrN(2)O(2), is transE configured and the dihedral angle between the aromatic ring planes is 22.3 (1)°. The crystal structure is stabilized by intra-molecular O-H⋯O and inter-molecular N-H⋯O hydrogen bonds.

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Project description:The title compound, C(17)H(17)ClN(2)O(3), has a trans conformation about the C=N double bond and an intra-molecular O-H?N occurs. The crystal structure is stabilized by inter-molecular N-H?O hydrogen bonds.

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N'-[1-(2-Hydroxy-phen-yl)ethyl-idene]-2-nitro-benzohydrazide methanol solvate.

Project description:In the title compound, C(15)H(13)N(3)O(4)·CH(3)OH, the dihedral angle between the two substituted benzene rings is 66.7?(2)°. An intra-molecular O-H?N hydrogen bond is observed in the Schiff base mol-ecule. In the crystal structure, the Schiff base and solvent mol-ecules are linked into chains running along the a axis by inter-molecular O-H?O and N-H?O hydrogen bonds.

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N'-[(1E)-(3,5-Dichloro-2-hydroxy-phen-yl)(phen-yl)methyl-ene]-4-methoxy-benzohydrazide.

Project description:The title compound, C(21)H(15)Cl(2)N(2)O(3), displays a trans configuration with respect to the C=N double bond. The mol-ecular conformation is stabilized by an intra-molecular O-H⋯N hydrogen bond.

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Project description:The title compound, C(11)H(14)N(2)O(2), was prepared by the reaction of acetohydrazide and 1-(4-methoxy-phen-yl)ethanone. In the mol-ecule, all bond lengths and angles are within normal ranges. In the crystal structure, adjacent mol-ecules are linked into a centrosymmetric dimer by inter-molecular N-H⋯O hydrogen bonding.

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(E)-N'-[1-(4-Bromo-phen-yl)ethyl-idene]benzohydrazide.

Project description:The asymmetric unit of the title compound, C(15)H(13)BrN(2)O, contains two independent mol-ecules with different conformations; the two aromatic rings form dihedral angles of 32.4?(4) and 27.5?(4)° in the two mol-ecules. In the crystal structure, inter-molecular N-H?O hydrogen bonds link mol-ecules into chains propagating in [100].

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(E)-N'-[1-(4-Amino-phen-yl)ethyl-idene]benzohydrazide.

Project description:Crystals of the title compound, C(15)H(15)N(3)O, were obtained from a condensation reaction of benzohydrazide and 1-(4-amino-phen-yl)ethanone. The mol-ecule assumes an E configuration with the amino-phenyl and benzohydrazide units located on opposite sites of the C=N double bond. In the crystal structure, the benzene rings of the mol-ecule are slightly twisted with respect to the central hydrazide, the dihedral angles being 18.22?(12) and 27.62?(12)°. The crystal structure contains inter-molecular N-H?O and weak C-H?N hydrogen bonding.

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(E)-N'-[1-(Thio-phen-2-yl)ethyl-idene]benzohydrazide.

Project description:The title compound, C(13)H(12)N(2)OS, was obtained from the condensation reaction of 2-acetyl-thio-phene and benzohydrazide. In the mol-ecule, the formohydrazide fragment is approximately planar (r.m.s deviation = 0.0146 Å) and the mean plane is oriented at dihedral angles of 24.47 (11) and 28.86 (13)°, respectively, to the phenyl and thio-phene rings. The thio-phene and phenyl rings make a dihedral angle of 53.21 (8)°. The benzamide fragment and thio-phene ring are located on the opposite sides of the C=N bond, showing an E conformation. Classical inter-molecular N-H⋯O hydrogen bonds and weak C-H⋯O inter-actions are present in the crystal structure: three such bonds occur to the same O-atom acceptor.

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