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N'-(5-Bromo-2-methoxy-benzyl-idene)-3,4-methyl-enedioxy-benzohydrazide.

ABSTRACT: In the title mol-ecule, C(16)H(13)BrN(2)O(4), the two benzene rings form a dihedral angle of 74.9?(2)°. In the crystal, mol-ecules are linked via inter-molecular N-H?O hydrogen bonds into chains propagating along the c axis.

SUBMITTER: Sang YL

PROVIDER: S-EPMC2969257 | biostudies-literature | 2009 Jun

REPOSITORIES: biostudies-literature

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N'-(5-Bromo-2-methoxy-benzyl-idene)-3,4-methyl-enedioxy-benzohydrazide.

Sang Ya-Li YL Lin Xue-Song XS

Acta crystallographica. Section E, Structure reports online 20090620 Pt 7

In the title mol-ecule, C(16)H(13)BrN(2)O(4), the two benzene rings form a dihedral angle of 74.9 (2)°. In the crystal, mol-ecules are linked via inter-molecular N-H⋯O hydrogen bonds into chains propagating along the c axis. ...[more]

PMID: 21582901

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

Project description:In the asymmetric unit of the title hydrazone compound, C(15)H(10)Br(2)N(2)O(4), there are two independent mol-ecules. In each mol-ecule, the five-membered ring adopts a flattened envelope conformation; the flap atoms are displaced by 0.114?(2) and 0.219?(2)?Å from the planes of the other four atoms. In one mol-ecule the dihedral angle between the two benzene rings is 22.8?(2)°, while in the other it is 40.8?(2)°. Each mol-ecule displays an E configuration with respect to the C=N bond. In both mol-ecules, intra-molecular O-H?N hydrogen bonds are observed. In the crystal structure, mol-ecules are linked through inter-molecular N-H?O hydrogen bonds, forming chains along the a axis.

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(E)-N'-(5-Bromo-2-methoxy-benzyl-idene)-3-methoxy-benzohydrazide.

Project description:In the title compound, C(16)H(15)BrN(2)O(3), there are two independent mol-ecules (A and B) in the asymmetric unit. The major difference between the two mol-ecules is the dihedral angle formed by the aromatic rings [72.6 (2) and 18.8 (2)° for A and B, respectively]. The benzohydrazide groups are not planar and the mol-ecules exist in trans configurations with respect to the methyl-idene units. The mol-ecular packing is stabilized by two inter-molecular N-H⋯O hydrogen bonds, forming chains parallel to the c axis. Only the A mol-ecules of the asymmetric unit are held together by π-π inter-actions [centroid-centroid distance = 3.714 (3) Å].

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(E)-N'-(5-Bromo-2-methoxy-benzyl-idene)-4-methoxy-benzohydrazide.

Project description:In the title compound, C(16)H(15)BrN(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 75.6 (2)°. In the crystal structure, mol-ecules are linked by inter-molecular N-H⋯O hydrogen bonds involving carbonyl and amine functionalities, to form chains parallel to the c cell axis.

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2-Bromo-N'-[(Z)-2-bromo-benzyl-idene]-5-methoxy-benzohydrazide.

Project description:In the title compound, C(15)H(12)Br(2)N(2)O(2), the mol-ecule adopts an E conformation about the C=N double bond and a transoid conformation about the central N-N bond, with a C(=O)-N-N-C(H) dihedral angle of 169.4?(4)°. In the crystal, mol-ecules are linked by N-H?O hydrogen bonds, leading to C(4) chains. The packing also features slipped ?-? stacking inter-actions, with a centroid-centroid separation of 3.838?(3)?Å and a slippage of 1.19?Å.

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N'-(5-Bromo-2-methoxy-benzyl-idene)-2-hydroxy-benzohydrazide.

Project description:The title Schiff base compound, C(15)H(13)BrN(2)O(3), is derived from the condensation of 5-bromo-2-methoxy-benzaldehyde with 2-hydroxy-benzohydrazide in an ethanol solution. The dihedral angle between the two aromatic rings is 6.9 (9)°. The meth-oxy group is coplanar with the attached ring [C-O-C-C = 3.1 (12)°]. An intra-molecular N-H⋯O hydrogen bond is observed. In the crystal structure, the mol-ecules are linked into chains along the [001] direction by inter-molecular O-H⋯N, O-H⋯O and C-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-Bromo-benzyl-idene)-3,4,5-tri-methoxy-benzohydrazide methanol solvate.

Project description:The title compound, C(17)H(17)BrN(2)O(4)·CH(4)O, was synthesized by the condensation of 3,4,5-trimethoxy-benzohydrazide and 2-bromo-benzaldehyde. The two aromatic rings are approximately planar, the dihedral angle being 3.08 (9)°. The mol-ecules are linked by inter-molecular N-H⋯O and O-H⋯O hydrogen bonds into chains along the a axis.

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N'-(5-Bromo-2-methoxy-benzyl-idene)-3-hydroxy-benzohydrazide methanol hemisolvate.

Project description:The asymmetric unit of the title compound, C(15)H(13)BrN(2)O(3)·0.5CH(3)OH, contains two Schiff base mol-ecules and a methanol mol-ecule of crystallization. The dihedral angles between the benzene rings in the two mol-ecules are 23.8?(2) and 18.6?(2)°. In the crystal structure, mol-ecules are linked through inter-molecular N-H?O, O-H?O and O-H?N hydrogen bonds, forming a three-dimensional network.

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N'-(3-Bromo-5-chloro-2-hydroxy-benzyl-idene)-2-methoxy-benzohydrazide.

Project description:The title compound, C(15)H(12)BrClN(2)O(3), was obtained by the condensation reaction between 3-bromo-5-chloro-2-hydroxy-benzaldehyde and 2-methoxy-benzohydrazide. The mol-ecule is essentially planar, with a dihedral angle between the two benzene rings of 4.7 (2)°, and displays an E configuration about the C=N double bond. The mol-ecular conformation is stabilized by intramolecular O-H⋯N and N-H⋯O hydrogen bonds. In the crystal structure, mol-ecules are linked into zigzag chains running parallel to the c axis by inter-molecular C-H⋯O hydrogen bonds. The chains are further connected through aromatic π-π stacking inter-actions with centroid-centroid distances of 3.583 (4) Å.

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N'-(5-Bromo-2-methoxy-benzyl-idene)-2-methoxy-benzohydrazide.

Project description:The title hydrazone compound, C(16)H(15)BrN(2)O(3), adopts an E configuration about the C=N double bond. The mol-ecule is twisted, the dihedral angle between the two substituted benzene rings being 22.0?(2)°. In the crystal structure, mol-ecules are linked through inter-molecular N-H?O hydrogen bonds, forming chains along the c axis.

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