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4-[(2-Hy-droxy-5-nitro-benzyl-idene)amino]-benzene-sulfonamide.

ABSTRACT: The title Schiff base compound, C(13)H(11)N(3)O(5)S, exists in an E configuration with respect to the C=N double bond. The benzene rings are almost coplanar, making a dihedral angle of 2.82?(6). The sulfonamide group is twisted away from the attached phenyl ring with an N-S-C-C torsion angle of 64.84?(11)°. An intra-molecular O-H?N hydrogen bond stabilizes the mol-ecule, generating an S(6) ring motif. In the crystal, inter-molecular N-H?O and C-H?O hydrogen bonds link the mol-ecules into a three-dimensional network.

SUBMITTER: Tan YH

PROVIDER: S-EPMC2983168 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature

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4-[(2-Hy-droxy-5-nitro-benzyl-idene)amino]-benzene-sulfonamide.

Tan Yi-Han YH Teoh Siang Guan SG Loh Wan-Sin WS Fun Hoong-Kun HK

Acta crystallographica. Section E, Structure reports online 20100925 Pt 10

The title Schiff base compound, C(13)H(11)N(3)O(5)S, exists in an E configuration with respect to the C=N double bond. The benzene rings are almost coplanar, making a dihedral angle of 2.82 (6). The sulfonamide group is twisted away from the attached phenyl ring with an N-S-C-C torsion angle of 64.84 (11)°. An intra-molecular O-H⋯N hydrogen bond stabilizes the mol-ecule, generating an S(6) ring motif. In the crystal, inter-molecular N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three ...[more]

PMID: 21587586

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4-[(2-Hy-droxy-benzyl-idene)amino]-N-(5-methyl-isoxazol-3-yl)benzene-sulfonamide: a monoclinic polymorph.

Project description:The title compound, C(17)H(15)N(3)O(4)S, is a monoclinic polymorph with space group P2(1)/c of the previously reported triclinic form in P [Subashini et al. (2009 ?). J. Chem. Crystallogr.39, 112-116]. In both polymorphs, intra-molecular O-H?N hydrogen bonds and dimer formation via a pair of inter-molecular N-H?N hydrogen bonds with an R(2) (2)(8) motif are observed. The two polymorphs differ in the next level of supra-molecular organization involving C-H?O hydrogen bonds with varied packing and different conformations.

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4-Hy-droxy-N'-(4-hy-droxy-3-nitro-benzyl-idene)benzohydrazide.

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Project description:The title compound, C(14)H(11)N(3)O(5), crystallized with two independent mol-ecules per asymmetric unit. Each mol-ecule assumes an E configuration with respect to the methyl-idene unit. Intra-molecular O-H?O and N-H?O hydrogen bonds are present in each mol-ecule and they are linked by an O-H?O hydrogen bond. The dihedral angles between the mean planes of the two benzene rings are 4.45?(16) and 1.7?(2)° in the two mol-ecules. The crystal structure is stabilized by inter-molecular O-H?O and N-H?O hydrogen bonds.

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4-Hy-droxy-N'-(3-nitro-benzyl-idene)benzohydrazide.

Project description:The title compound, C(14)H(11)N(3)O(4), was obtained by a condensation reaction between 3-nitro-benzaldehyde and 4-hy-droxy-benzohydrazide. The whole mol-ecule is approximately planar, with a dihedral angle of 9.2?(3)° between the benzene rings. The mol-ecule displays an E conformation about the C=N bond. In the crystal, mol-ecules are linked via N-H?O, O-H?O and O-H?N hydrogen bonds, generating sheets parallel to the bc plane.

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2-Hy-droxy-N'-(5-hy-droxy-2-nitro-benzyl-idene)-3-methyl-benzohydrazide.

Project description:The title compound, C(15)H(13)N(3)O(5), was prepared by condensing 5-hy-droxy-2-nitro-benzaldehyde and 2-hy-droxy-3-methyl-benzohydrazide in methanol. The two benzene rings make a dihedral angle of 3.9?(3)°. An intra-molecular O-H?O hydrogen bond is observed. The crystal structure is stabilized by inter-molecular O-H?O and N-H?O hydrogen bonds, and C-H?O and ?-? inter-actions [centroid-centroid distances = 3.5658?(17)-3.9287?(19)?Å].

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4-[(4-Meth-oxy-benzyl-idene)amino]-benzene-sulfonamide.

Project description:The title Schiff base compound, C(14)H(14)N(2)O(3)S, is non-planar, with a dihedral angle of 24.16?(7)° between the benzene rings. In the crystal, N-H?O and N-H?N hydrogen bonds link the mol-ecules into a layer parallel to (011). Intra- and inter-layer C-H?O inter-actions and ?-? inter-actions [centroid-centroid distances = 3.8900?(9) and 3.9355?(8)?Å] are also present.

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(E)-N'-(3-Hy-droxy-benzyl-idene)-3-nitro-benzohydrazide.

Project description:The title compound, C(14)H(11)N(3)O(4), was prepared by the reaction of 3-nitro-benzohydrazide with 3-hy-droxy-benzalde-hyde. The mol-ecule adopts an E configuration about the C=N bond. The dihedral angle between the two benzene rings is 32.3?(2)°. In the crystal, the mol-ecules are linked through inter-molecular N-H?O, O-H?N, and O-H?O hydrogen bonds, forming chains in the a-axis direction.

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