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(E)-N'-[(2-Hydroxy-1-naphthyl)methyl-ene]benzohydrazide monohydrate.

ABSTRACT: In the title compound, C(18)H(14)N(2)O(2)·H(2)O, the dihedral angle between the benzene ring and the naphthalene system is 5.18 (10)°. Intra-molecular N-H⋯O hydrogen bonds influence the molecular conformation. In the crystal, inter-molecular N-H⋯O and O-H⋯O hydrogen bonds are observed as well as π-π inter-actions between the phenyl ring and the substituted ring of the naphthalene [centroid-centroid distance = 3.676 (11) Å].

SUBMITTER: Qiao Y

PROVIDER: S-EPMC2980093 | biostudies-literature |

REPOSITORIES: biostudies-literature

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N'-Diphenyl-methyl-ene-2-hydroxy-benzohydrazide.

Project description:The title compound, C(20)H(16)N(2)O(2), was synthesized by the reaction of 2-hydroxy-benzohydrazide with diphenyl-methanone. The dihedral angle between the phenyl rings is 76.28?(11)°. The amino H atom is involved in an intra-molecular N-H?O hydrogen bond. In the crystal structure, the hydr-oxy groups and carbonyl O atoms form inter-molecular O-H?O hydrogen bonds, which link the mol-ecules into chains running along the b axis.

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(E)-4-Bromo-N'-(2-hydr-oxy-1-naphthyl-methyl-ene)benzohydrazide.

Project description:The title compound, C(18)H(13)BrN(2)O(2), was synthesized by the reaction of 2-hydr-oxy-1-naphthaldehyde with 4-bromo-benzohydrazide. This Schiff base mol-ecule has an E configuration about the C=N bond and is almost planar, the dihedral angle between the mean planes through the substituted benzene ring and the naphthyl system being 6.6?(2)°. There is an intra-molecular O-H?N hydrogen bond involving the naphthyl hydr-oxy substituent and the N' atom of the hydrazide group. In the crystal structure, mol-ecules are linked through inter-molecular N--H?O hydrogen bonds to form chains extending along the b direction.

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(E)-2-Chloro-N'-(2-hydr-oxy-1-naphthyl-methyl-ene)benzohydrazide.

Project description:In the structue of the title compound, C(18)H(13)ClN(2)O(2), a new Schiff base, the dihedral angle between the benzene and naphthyl ring system mean planes is 22.5 (2)°. The mol-ecule has an E configuration about the C=N bond, and an intra-molecular hydrogen bond involving the hydoxyl substituent on the naphthyl ring and the N' atom of the hydrazide. The crystal structure is stabilized by inter-molecular N-H⋯O hydrogen bonds, forming one-dimensional chains running parallel to the a axis.

| S-EPMC2959739 | biostudies-literature

N'-[(E)-(5-Bromo-2-hydroxy-phen-yl)(phen-yl)methyl-ene]benzohydrazide.

Project description:In the title compound, C(20)H(15)BrN(2)O(2), the C=N double bond displays a trans configuration. The crystal structure features an intra-molecular O-H?N hydrogen bond.

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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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N'-(Furan-2-ylmethyl-ene)-2-hydroxy-benzohydrazide.

Project description:In the title mol-ecule, C(12)H(10)N(2)O(3), the aromatic and furan rings form a dihedral angle of 8.89 (1)° and an intra-molecular N-H⋯O hydrogen bond occurs. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into zigzag chains running along the c axis.

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(E)-N'-(3,5-Dibromo-2-hydroxy-benzyl-idene)-4-hydroxy-benzohydrazide monohydrate.

Project description:The title compound, C(14)H(10)Br(2)N(2)O(3)·H(2)O, was synthesized by the reaction of 3,5-dibromo-2-hydroxy-benzaldehyde with an equimolar amount of 4-hydroxy-benzohydrazide in methanol. The structure comprises a Schiff base unit and a water mol-ecule of crystallization. The dihedral angle between the benzene rings in the Schiff base is 1.3 (3)°. In the crystal structure, mol-ecules are linked through inter-molecular O-H⋯O and N-H⋯O hydrogen bonds, with the water mol-ecule serving as both donor and acceptor. As a result, layers are formed, which are approximately parallel to the bc plane.

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N'-(2-Hydroxy-benzyl-idene)-2-methoxy-benzohydrazide monohydrate.

Project description:In the title compound, C(15)H(14)N(2)O(3)·H(2)O, the Schiff base mol-ecule is approximately planar, with a dihedral angle between the two aromatic rings of 10.2?(3)°. The mol-ecular structure is stabilized by O-H?N and N-H?O hydrogen bonds. In the crystal structure, the Schiff base and water mol-ecules are linked together by inter-molecular O-H?O hydrogen bonds, forming chains parallel to the a axis.

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4-Chloro-N'-(2-hydroxy-benzyl-idene)benzohydrazide monohydrate.

Project description:The asymmetric unit of the title compound, C(14)H(11)ClN(2)O(2)·H(2)O, contains a Schiff base mol-ecule and a water mol-ecule of crystallization. The dihedral angle between the two aromatic rings is 27.3 (4)°. In the crystal structure, mol-ecules are linked into a two-dimensional network parallel to the bc plane by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds involving the water mol-ecules.

| S-EPMC2960496 | biostudies-literature

3,5-Dihydr-oxy-N'-(2-hydroxy-benzyl-idene)benzohydrazide monohydrate.

Project description:The title potential anti-bacterial compound, C(14)H(12)N(2)O(4)·H(2)O, is a Schiff base which has an intra-molecular O-H⋯N hydrogen bond and crystallizes with one uncoordinated water mol-ecule, which links three symmetry-related mol-ecules through two O-H⋯O and one N-H⋯O hydrogen bond. In the crystal structure, further inter-molecular O-H⋯O hydrogen bonds link symmetry-related mol-ecules, forming layers parallel to the bc plane.

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