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N'-[(E)-2-Hy-droxy-5-meth-oxy-benzyl-idene]pyridine-4-carbohydrazide monohydrate.

ABSTRACT: The title compound, C14H13N3O3·H2O, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. An intra-molecular O-H?N hydrogen bond occurs. In the crystal, the lattice water molecule plays a major role in the supramolecular architecture by interconnecting adjacent molecules into a three-dimensional netwrok by means of O-H?O, O-H?N and N-H?O hydrogen-bonding inter-actions. The structure also features two non-classical C-H?O inter-actions.

SUBMITTER: Prasanna MK

PROVIDER: S-EPMC3685038 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature

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N'-[(E)-2-Hy-droxy-5-meth-oxy-benzyl-idene]pyridine-4-carbohydrazide monohydrate.

Prasanna M K MK Sithambaresan M M Pradeepkumar K K Kurup M R Prathapachandra MR

Acta crystallographica. Section E, Structure reports online 20130515 Pt 6

The title compound, C14H13N3O3·H2O, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. An intra-molecular O-H⋯N hydrogen bond occurs. In the crystal, the lattice water molecule plays a major role in the supramolecular architecture by interconnecting adjacent molecules into a three-dimensional netwrok by means of O-H⋯O, O-H⋯N and N-H⋯O hydrogen-bonding inter-actions. The structure also features two non-classical C-H⋯O inter-actions. ...[more]

PMID: 23795057

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N'-[(E)-2-Hy-droxy-5-meth-oxy-benzyl-idene]pyridine-4-carbohydrazide.

Project description:In the title compound, C(14)H(13)N(3)O(3), the dihedral angle between the pyridine and benzene rings is 15.17?(18)°. The torsion angle of the -C=N-N-C- system between two aromatic rings is -167.1?(3)°. Intra-molecular O-H?N hydrogen bonding generates S(6) rings. In the crystal structure, neighbouring mol-ecules are linked together along the c axis by weak inter-molecular C-H?O and N-H?O hydrogen bonds, generating R(1) (2)(6) ring motifs.

| S-EPMC3009050 | biostudies-literature

<i>N</i>'-(2-Hy-droxy-3-meth-oxy-benzyl-idene)pyrazine-2-carbohydrazide monohydrate.

Project description:In the title hydrated Schiff base, C13H12N4O3·H2O, the dihedral angle between the aromatic rings is 5.06 (11)° and an intra-molecular O-H⋯N hydrogen bond closes an S(6) ring. In the crystal, Ow-H⋯O and Ow-H⋯N (w = water) hydrogen bonds link the components into centrosymmetric tetra-mers (two Schiff bases and two water mol-ecules). Longer N-H⋯O hydrogen bonds link the tetra-mers into [010] chains. A weak C-H⋯O hydrogen bond and aromatic π-π stacking between the pyrazine and phenyl rings [centroid-centroid separations = 3.604 (2) and 3.715 (2) Å] are also observed.

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(E)-N'-(5-Bromo-2-hy-droxy-3-meth-oxy-benzyl-idene)-2-hy-droxy-benzohydrazide monohydrate.

Project description:The organic molecule of the title hydrate, C(15)H(13)BrN(2)O(4)·H(2)O, is roughly planar, with a mean deviation of 0.0939 (2) Å. The dihedral angle between the two aromatic rings is 8.2 (3)°. Intra-molecular O-H⋯N and O-H⋯O hydrogen bonds are observed. In the crystal, N-H⋯O(water) and O(water)-H⋯O hydrogen bonds lead to a three-dimensional network.

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(E)-4-Amino-N'-(2-hy-droxy-5-meth-oxy-benzyl-idene)benzohydrazide monohydrate.

Project description:In the title compound, C(15)H(15)N(3)O(3)·H(2)O, the hydazide Schiff base mol-ecule shows an E conformation around the C=N bond. An intra-molecular O-H?N hydrogen bond makes an S(6) ring motif. The dihedral angle between the substituted phenyl rings is 23.40?(11)°. The water mol-ecule mediates linking of neighbouring mol-ecules through O-H?(O,O) hydrogen bonds into infinite chains along the a axis, which are further connected together through N-H?O hydrogen bonds, forming a two-dimensional network parallel to (001). C-H?O inter-actions aso occur.

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(E)-4-Bromo-N'-(4-hy-droxy-3-meth-oxy-benzyl-idene)benzohydrazide monohydrate.

Project description:In the title compound, C(15)H(13)BrN(2)O(3)·H(2)O, the dihedral angle between the two benzene rings is 13.92?(6)°. The meth-oxy group of the 4-hy-droxy-3-meth-oxy-phenyl is almost coplanar with its bound benzene ring, as seen by the C(meth-yl)-O-C-C torsion angle of -0.35?(16)°. In the crystal, mol-ecules are linked into a three-dimensional network by N-H?O, O-H?N and O-H?O hydrogen bonds and also weak C-H?O inter-actions. A short C?O contact of 3.0191?(15)?Å is also present.

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N'-[(E)-5-Bromo-2-hy-droxy-3-meth-oxy-benzyl-idene]benzohydrazide monohydrate.

Project description:The title compound, C15H13BrN2O3·H2O, exists in an E conformation with respect to the azo-methane C=N double bond. The benzene and phenyl rings form dihedral angles of 0.46?(2) and 4.90?(3)°, respectively with the central C(=O)N2C unit. An intra-molecular O-H?N hydrogen bond occurs. In the crystal, some hydrazide mol-ecules are replaced by mol-ecules of the 6-bromo isomer. The Br atom from this admixture was refined to give a partial occupancy of 0.0443?(19). A supra-molecular network is built in the lattice by means of inter-molecular N-H?O and two O-H?O inter-actions together with non-classical C-H?O inter-actions involving the lattice water mol-ecule stacking the mol-ecules along the b-axis direction.

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2-[(2-Hy-droxy-4-meth-oxy-benzyl-idene)aza-nium-yl]benzoate monohydrate.

Project description:In the title compound, C(15)H(13)NO(4)·H(2)O, the Schiff base exists in a zwitterionic form and a bifurcated intra-molecular N-H⋯(O,O) hydrogen bond generates two S(6) rings. The dihedral angle between the two benzene rings is 25.8 (2)°. The crystal structure is stabilized by inter-molecular O-H⋯O hydrogen bonds.

| S-EPMC3006953 | biostudies-literature

N'-[(E)-2-Hy-droxy-3,5-diiodo-benzyl-idene]pyridine-3-carbohydrazide.

Project description:In the title compound, C(13)H(9)I(2)N(3)O(2), the dihedral angle between the two aromatic rings is 10.5 (2)°. The mol-ecule displays a trans configuration with respect to the C=N bond. An intra-molecular O-H⋯N hydrogen bond occurs. The crystal packing is stabilized by N-H⋯O and C-H⋯O hydrogen bonds.

| S-EPMC3200631 | biostudies-literature

(E)-N'-(4-Meth-oxy-benzyl-idene)pyridine-3-carbohydrazide dihydrate.

Project description:In the title compound, C14H13N3O2·2H2O, the hydrazone mol-ecule adopts an E conformation with respect to the C=N bond. The dihedral angle between the benzene and pyridine rings is 8.55 (10)°. The methyl-idene-hydrazide [-C(=O)-N-N=C-] fragment is essentially planar, with a maximum deviation of 0.0375 (13) Å. The mean planes of the benzene and pyridine rings make dihedral angles of 2.71 (14) and 11.25 (13)°, respectively, with mean plane of the methyl-idene-hydrazide fragment. In the crystal, the benzohydrazide and water mol-ecules are linked by N-H⋯O, O-H⋯O and O-H⋯N hydrogen bonds into a three-dimensional network.

| S-EPMC3770434 | biostudies-literature

N'-[(E)-2-Hy-droxy-5-iodo-benzyl-idene]furan-2-carbohydrazide monohydrate.

Project description:The organic mol-ecule of the title monohydrate, C(12)H(9)IN(2)O(3)·H(2)O, features a disordered furyl ring with the major component [site occupancy = 0.575?(18)] having the carbonyl O and furyl O atoms syn, and the other conformation having these atoms anti. The mol-ecule is slightly twisted with the dihedral angle between the benzene and furyl rings being 10.3?(6)° (major component). An intra-molecular O-H?N(imine) hydrogen bond is formed. In the crystal, the water mol-ecule accepts a hydrogen bond from an amine H atom, and forms two O-H?O(carbon-yl) hydrogen bonds, thereby linking three different carbohydrazide mol-ecules. The result is a supra-molecular layer parallel to (001). The closest contacts between layers are of the type I?I, at a distance of 3.6986?(6)?Å.

| S-EPMC3275173 | biostudies-literature

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