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

ABSTRACT: In the title compound, C(16)H(16)N(2)O(5)·H(2)O, the dihedral angle between the two benzene rings is 25.9 (1)°. Intra-molecular O-H⋯O and N-H⋯O hydrogen bonds are observed. In the crystal, the components are linked into a three-dimensional network by O-H⋯O and O-H⋯(O,O) hydrogen bonds.

SUBMITTER: Xu B

PROVIDER: S-EPMC2970986 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature

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

Xu Bin B Han Ling L Zhang Qi-Hui QH

Acta crystallographica. Section E, Structure reports online 20091003 Pt 11

In the title compound, C(16)H(16)N(2)O(5)·H(2)O, the dihedral angle between the two benzene rings is 25.9 (1)°. Intra-molecular O-H⋯O and N-H⋯O hydrogen bonds are observed. In the crystal, the components are linked into a three-dimensional network by O-H⋯O and O-H⋯(O,O) hydrogen bonds. ...[more]

PMID: 21578231

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(E)-N'-(2,5-Dimethoxy-benzyl-idene)-2,4-dihydroxy-benzohydrazide.

Project description:In the title compound, C(16)H(16)N(2)O(5), the dihedral angle between the two benzene rings is 4.2 (2)° and an intra-molecular O-H⋯O hydrogen bond generates an S(6) ring. In the crystal, mol-ecules are linked into layers lying parallel to the bc plane by O-H⋯O and N-H⋯O hydrogen bonds.

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(E)-N'-(3,4-Dimethoxy-benzyl-idene)-2,4-dihydroxy-benzohydrazide methanol solvate.

Project description:The title compound, C(16)H(16)N(2)O(5)·CH(3)OH, was obtained from a condensation reaction of 3,4-dimethoxy-benzaldehyde and 2,4-dihydroxy-benzohydrazide. The non-H atoms of the Schiff base mol-ecule are approximately coplanar (r.m.s. deviation = 0.043 Å) and the dihedral angle between the two benzene rings is 1.6 (1)°. The mol-ecule adopts an E configuration with respect to the C=N double bond. An intra-molecular O-H⋯O hydrogen bond is observed. The Schiff base and methanol mol-ecules are linked into a two-dimensional network parallel to (10) by inter-molecular N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds.

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(E)-N'-(4-Bromo-benzyl-idene)-3,4-dihydroxy-benzohydrazide monohydrate.

Project description:In the title compound, C(14)H(11)BrN(2)O(3)·H(2)O, the dihedral angle between the two benzene rings of the Schiff base is 22.7 (2)° and an intra-molecular O-H⋯O hydrogen bond is observed. In the crystal, mol-ecules are linked into layers parallel to the ab plane by O-H⋯O and N-H⋯O hydrogen bonds.

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N'-(2,3-Dimethoxy-benzyl-idene)-2,4-dihydroxy-benzohydrazide.

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N'-(3,4-Dihydroxy-benzyl-idene)acetohydrazide monohydrate.

Project description:In the title compound, C(9)H(10)N(2)O(3)·H(2)O, the Schiff base mol-ecule is approximately planar, the dihedral angle between the benzene and acetohydrazide planes being 5.40 (7)°. An intra-molecular O-H⋯O hydrogen bond is observed. In the crystal, mol-ecules are linked into a two-dimensional network parallel to (100) by O-H⋯O, N-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds, and by π-π inter-actions between symmetry-related benzene rings [centroid-centroid distance = 3.543 (2) Å].

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(E)-N'-(3,4-Dihydroxy-benzyl-idene)-4-nitro-benzohydrazide.

Project description:In the title Schiff base compound, C(14)H(11)N(3)O(5), the dihedral angle between the two benzene rings is 1.6 (1)°. The mol-ecule displays an E configuration about the C=N bond. An intra-molecular O-H⋯O hydrogen bond is observed. In the crystal, mol-ecules are linked into layers parallel to (101) by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds. One of the hydroxyl groups is disordered over two positions, with occupancies of 0.643 (5) and 0.357 (5).

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N'-(2,5-Dihydroxy-benzyl-idene)-2-hydr-oxy-3-methyl-benzohydrazide.

Project description:In the title compound, C(15)H(14)N(2)O(4), the dihedral angle between the two benzene rings is 4.1 (2)°. The mol-ecule adopts an E configuration with respect to the C=N bond. There are intra-molecular O-H⋯N and O-H⋯O hydrogen bonds in the mol-ecule. In the crystal structure, mol-ecules are linked through inter-molecular N-H⋯O and O-H⋯O hydrogen bonds, forming chains running along the c axis.

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(E)-Ethyl N'-(3,4-dimethoxy-benzyl-idene)hydrazinecarboxyl-ate monohydrate.

Project description:In the title compound, C(12)H(16)N(2)O(4)·H(2)O, the mol-ecular skeleton of the hydrazinecarboxyl-ate is nearly planar [within 0.053 (3) Å]. In the crystal, chains propagating along the c axis arise, composed of alternating hydrazinecarboxyl-ate mol-ecules and crystalline water, which inter-act via N-H⋯O and O-H⋯O hydrogen bonds.

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(E)-N'-(3,4-Dihy-droxy-benzyl-idene)-2,4-dimethyl-benzohydrazide monohydrate.

Project description:In the title compound, C16H16N2O3·H2O, the dihedral angle between the benzene rings is 30.27?(7)°. In the crystal, the components are linked by N-H?O, O-H?O and C-H?O inter-actions into a three-dimensional network.

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N'-(3,4-Dimethoxy-benzyl-idene)acetohydrazide.

Project description:In the title mol-ecule, C(11)H(14)N(2)O(3), the acetohydrazide group is planar 0.084 (1) Å and forms a dihedral angle of 19.7 (1)° with the benzene ring. One of the meth-oxy groups is coplanar with the attached benzene ring within 0.052 (3) Å, whereas the other is slightly twisted [C-O-C-C = 6.3 (3)°]. The mol-ecule adopts a trans configuration with respect to the C=N bond. In the crystal, the mol-ecules are linked into chains along the a axis by N-H⋯O hydrogen bonds and the chains are cross-linked into a three-dimensional network by C-H⋯O hydrogen bonds.

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