3-Hydroxy-<i>N</i>′-(2-hydroxybenzylidene)benzohydrazide

Peng, Shu You; Hou, Haiyun

doi:10.1107/s1600536808027426

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…In recent years, a large number of hydrazones have been reported (e.g. Peng & Hou, 2008a;Shan et al, 2008). As a part of our studies in this area, we describe herein the synthesis and crystal structure of the title compound (I).…”

Section: Structure Descriptionmentioning

confidence: 99%

Polymorph of (E)-N′-(4-chlorobenzylidene)isonicotinohydrazide monohydrate

et al. 2018

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The title hydrate, C13H10ClN3O·H2O, is the orthorhombic polymorph of the previously reported monoclinic compound [Fun et al. (2012). Acta Cryst. E68, o2303–o2304). In the title compound, the dihedral angle between the pyridine and benzene rings is 18.0 (2)°. In the crystal, the Schiff base molecules and water molecules are linked via O—H...O, N—H...O and O—H...N hydrogen bonds, forming a two-dimensional network parallel to (001). In addition, the Schiff base molecules are linked end-to-end by weak C—H...Cl hydrogen along the c-axis direction, forming an overall three-dimensional network. Weak C—H...π interactions are also observed.

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Section: Structure Descriptionmentioning

confidence: 99%

Polymorph of (E)-N′-(4-chlorobenzylidene)isonicotinohydrazide monohydrate

et al. 2018

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N′-(5-Bromo-2-hydroxy-3-methoxybenzylidene)isonicotinohydrazide

Peng

Hou

2008

Acta Cryst E

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The title compound, C14H12BrN3O3, was prepared by reaction of 5-bromo-3-methoxysalicylaldehyde and isonicotinohydrazide in methanol. The molecule is not planar and adopts a trans configuration with respect to the C=N bond. There is an intramolecular O—H⋯N hydrogen bond in the molecule. The dihedral angle between the benzene and pyridine rings is 12.2 (2)°. In the crystal structure, molecules are linked through intermolecular N—H⋯N hydrogen bonds, forming chains running along the c-axis direction.

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(E)-N′-(2-Hydroxy-4-methoxybenzylidene)isonicotinohydrazide monohydrate

Peng

Hou

2008

Acta Cryst E

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The title compound, C14H13N3O3·H2O, was prepared by the reaction of 4-methoxysalicylaldehyde and isonicotinohydrazide in ethanol. The Schiff base molecule is not planar and has an E configuration with respect to the methylidene unit. The dihedral angle between the benzene and pyridine rings is 36.8 (2)°. In the molecule there is an intramolecular O—H⋯N hydrogen bond involving the hydroxyl substituent and the N atom of the 2-hydroxy-4-methoxybenzylidene unit. In the crystal, the molecules are linked through intermolecular O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds, forming layers parallel to the bc plane.

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3-Hydroxy-N′-(2-hydroxybenzylidene)benzohydrazide

Cited by 5 publications

References 13 publications

Polymorph of (E)-N′-(4-chlorobenzylidene)isonicotinohydrazide monohydrate

Polymorph of (E)-N′-(4-chlorobenzylidene)isonicotinohydrazide monohydrate

N′-(5-Bromo-2-hydroxy-3-methoxybenzylidene)isonicotinohydrazide

(E)-N′-(2-Hydroxy-4-methoxybenzylidene)isonicotinohydrazide monohydrate

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