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N'-(2-Hydr-oxy-5-nitro-benzyl-idene)-2-(1H-indol-3-yl)acetohydrazide.

ABSTRACT: The mol-ecule of the title compound, C(17)H(14)N(4)O(4), uses its amide -NH- group to form a hydrogen bond to the amido -C(=O)- group of an adjacent mol-ecule to furnish a linear chain structure. The hydr-oxy group forms an intra-molecular hydrogen bond; the indolyl -NH- unit does not engage in any strong hydrogen-bonding inter-actions.

SUBMITTER: Puvaneswary S

PROVIDER: S-EPMC2960495 | biostudies-literature | 2008

REPOSITORIES: biostudies-literature

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N'-[(E)-4-Meth-oxy-benzyl-idene]-2-(5-meth-oxy-2-methyl-1H-indol-3-yl)acetohydrazide.

Project description:The conformation adopted by the title compound, C20H21N3O3, in the crystal is 'J'-shaped and appears to be at least partially directed by a weak intra-molecular C-H?N hydrogen bond. In the crystal, mol-ecules are linked by N-H?O hydrogen bonds, forming dimers with R 2 (2)(8) motifs. Furthermore, these dimers connect to each other via C-H?O and N-H?O hydrogen bonds to form a three-dimensional network.

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(E)-N'-(4-Meth-oxy-benzyl-idene)-2-(2-methyl-4-nitro-1H-imidazol-1-yl)acetohydrazide.

Project description:In the title compound, C(14)H(15)N(5)O(4), the central -C=N-N-C(=O)-C- bridge is nearly planar [maximum deviation = 0.037?(1)?Å] and forms dihedral angles of 7.37?(9) and 73.33?(5)°, respectively, with the benzene and imidazole rings. The dihedral angle between the benzene and imidazole rings is 66.08?(9)°. The meth-oxy and nitro groups are nearly coplanar with the benzene and imidazole rings, respectively, with a C-O-C-C torsion angle of 5.9?(2)° and an O-N-C-C angle of -0.2?(2)°. In the crystal, mol-ecules are linked by a pair of N-H?O hydrogen bonds with an R(2) (2)(8) ring motif, forming an inversion dimer. The dimers are further inter-connected by C-H?O hydrogen bonds into a sheet parallel to the (111) plane. A C-H?? inter-action is also observed between the sheets.

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N'-(4-Hydr-oxy-3-methoxy-benzyl-idene)acetohydrazide monohydrate.

Project description:In the title compound, C(10)H(12)N(2)O(3)·H(2)O, the Schiff base mol-ecule is approximately planar [within 0.189?(1)?Å]. The inter-planar angle between the benzene and acetohydrazide planes is 8.50?(10)°. In the crystal, mol-ecules are linked into a three-dimensional network by strong and weak O-H?O and strong N-H?O hydrogen bonds. The hydr-oxy H atom deviates from the 4-hydr-oxy-3-methoxy-phenyl mean plane by 0.319?(2)?Å, probably due to the involvement of this H atom in the O-H?O hydrogen bond. The weak O-H?O hydrogen bond is involved in a bifurcated hydrogen bond with R(1) (2)(4) motif. A weak C-H?? inter-action is also present.

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3-Hydr-oxy-N'-(5-hydr-oxy-2-nitro-benzyl-idene)-2-naphthohydrazide.

Project description:The mol-ecule of the title compound, C(18)H(13)N(3)O(5), displays an E configuration with respect to the C=N double bond. The dihedral angle between the benzene ring and the naphthyl system is 1.1?(2)°. In the crystal structure, mol-ecules are linked through inter-molecular N-H?O and O-H?O hydrogen bonds, forming a three-dimensional network.

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Project description:The mol-ecule of the title compound, C(14)H(11)N(3)O(4), is approximately planar, the dihedral angle between the planes of the two substituted benzene rings being 2.54?(7)°. The mol-ecule exists in a trans configuration with respect to the central methyl-idene unit. In the crystal structure, mol-ecules are linked through inter-molecular O-H?O, N-H?O and C-H?O hydrogen bonds, forming layers parallel to (101). The O/N-H?O and C-H?O inter-actions form a pair of bifurcated acceptor bonds involving the cabon-yl/nitro O atom, generating an R(2) (1)(6) motif.

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N'-(2-Hydr-oxy-5-nitro-benzyl-idene)benzene-sulfonohydrazide.

Project description:The mol-ecule of the title compound, C(13)H(11)N(3)O(5)S, shows a phenyl group and an almost planar intra-molecularly hydrogen-bonded N'-(2-hydr-oxy-5-phenyl-ebenzyl-idene)hydrazino group disposed about the S atom. Adjacent mol-ecules are linked by N-H⋯O(nitro) hydrogen bonds, producing a linear chain that runs along the b axis of the unit cell.

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2-(1H-Indol-3-yl)acetohydrazide.

Project description:In the title compound C(10)H(11)N(3)O, the mean plane of the indole ring system (r.m.s. deviation 0.0131 Å) subtends a dihedral angle of 87.27 (5)° to the almost planar acetohydrazide substituent (r.m.s. deviation 0.0291 Å). In the crystal, bifurcated N-H⋯(O,N) and N-H⋯N hydrogen bonds involving the pyrrole N-H grouping combine to form zigzag chains along a. Additional N-H⋯O contacts from the hydrazide N-H group augmented by C-H⋯π inter-actions link the mol-ecules into chains along the a axis. The overall effect of these contacts is a three-dimensional network structure with mol-ecules stacked along the b-axis direction.

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N'-(5-Hydr-oxy-2-nitro-benzyl-idene)-2-methoxy-benzohydrazide.

Project description:The asymmetric unit of the title compound, C(15)H(13)N(3)O(5), contains two independent mol-ecules. Each mol-ecule displays an E configuration with respect to its C=N double bond. The dihedral angles between the two benzene rings are 11.1?(2) and 10.9?(2)° in the two mol-ecules. In the crystal structure, mol-ecules are linked through inter-molecular O-H?O hydrogen bonds, forming chains running along the a axis.

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2-Chloro-N'-(5-hydr-oxy-2-nitro-benzyl-idene)benzohydrazide.

Project description:The mol-ecule of the title Schiff base compound, C(14)H(10)ClN(3)O(4), exists in a trans configuration with respect to the acyclic C=N bond. The dihedral angle between the two benzene rings is 62.37?(9)°. An intra-molecular C-H?O hydrogen bond is observed. In the crystal structure, adjacent mol-ecules are linked into a ribbon along [10] by O-H?O and N-H?O hydrogen bonds.

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2-Hydr-oxy-N'-(2-hydr-oxy-3-meth-oxy-5-nitro-benzyl-idene)-3-methyl-benzo-hydrazide.

Project description:In the title compound, C(16)H(15)N(3)O(6), the dihedral angle between the two benzene rings is 0.9?(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 hydrogen bonds to form chains running along the c axis.

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