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N'-(3-Bromo-4-methoxy-benzyl-idene)nicotinohydrazide monohydrate.

ABSTRACT: In the title compound, C(14)H(12)BrN(3)O(2)·H(2)O, the benzene ring is oriented at a dihedral angle of 39.66 (11)° with respect to the pyridine ring. The solvent water mol-ecule links with the organic compound via O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonding.

SUBMITTER: Bao FY

PROVIDER: S-EPMC2969945 | biostudies-literature |

REPOSITORIES: biostudies-literature

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N'-(2-Methoxy-benzyl-idene)nicotinohydrazide.

Project description:The title compound, C(14)H(13)N(3)O(2), was prepared by the reaction of 2-methoxy-benzyaldehyde with nicotinic acid hydrazide in methanol. The dihedral angle between the benzene and pyridine rings is 5.9?(3)°. In the crystal structure, mol-ecules are linked by inter-molecular N-H?O hydrogen bonds, leading to the formation of chains along the c axis; adjacent chains are linked via C-H?O and C-H?N hydrogen bonds.

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Crystal structure of (E)-N'-(5-bromo-2-hy-droxy-benzyl-idene)nicotinohydrazide monohydrate.

Project description:In the title compound, C13H10BrN3O2·H2O, the conformation about the azomethine double bond is E. The mol-ecule exists in the amido form with a C=O bond length of 1.229 (2) Å. There is an intra-molecular O-H⋯N hydrogen bond forming an S(6) ring motif. The whole mol-ecule is almost planar, with an r.m.s. deviation of 0.021 Å for all non-H atoms, and the dihedral angle between the planes of the pyridine and benzene rings is 0.74 (12)°. In the crystal, the water mol-ecule of crystallization links the organic mol-ecules via Ow-H⋯O, Ow-H⋯N and N-H⋯Ow hydrogen bonds and short C-H⋯Ow contacts, forming sheets lying parallel to (100). Within the sheets there is a weak π-π inter-action involving the pyridine and benzene rings [centroid-to-centroid distance = 3.8473 (15) Å]. The sheets are linked via C-H⋯Br inter-actions, forming a three-dimensional network.

| S-EPMC4518959 | biostudies-literature

(E)-N'-(3,4-Di-meth-oxy-benzyl-idene)nicotinohydrazide monohydrate.

Project description:In the title hydrated compound, C15H15N3O3·H2O, the nicotinohydrazide mol-ecule adopts a trans conformation with respect to the C=N double bond. The dihedral angle between the benzene and pyridine rings is 5.10?(14)°. In the crystal, the solvent water mol-ecule acts as an acceptor, forming an N-H?O hydrogen bond supported by two C-H?O contacts. It also acts as a donor, forming bifurcated O-H?(O,O) and O-H?N hydrogen bonds that combine with the former contacts to form zigzag chains of mol-ecules along the c-axis direction. An additional O-H?O donor contact completes a set of six hydrogen bonds to and from the water mol-ecule and connects it to a third nicotinohydrazide mol-ecule. This latter contact combines with weaker C-H?O hydrogen bonds supported by a C-H?? contact to stack mol-ecules along b in a three-dimensional network.

| S-EPMC4120580 | biostudies-literature

N'-[(E)-3-Chloro-2-fluoro-benzyl-idene]-6-methyl-nicotinohydrazide monohydrate.

Project description:The title compound, C(14)H(11)ClFN(3)O·H(2)O, exists in an E conformation with respect to the N=C bond. The pyridine ring forms a dihedral angle of 5.00 (9)° with the benzene ring. In the crystal, the ketone O atom accepts one O-H⋯O and one C-H⋯O hydrogen bond, the water O atom accepts one N-H⋯O and two C-H⋯O hydrogen bonds and the pyridine N atom accepts one O-H⋯N hydrogen bond, forming layers parallel to the ab plane.

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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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(E)-N'-(3-Bromo-5-chloro-2-hy-droxy-benzyl-idene)nicotinohydrazide.

Project description:There are two independent mol-ecules in the asymmetric unit of the title compound, C(13)H(9)BrClN(3)O(2), in which the dihedral angles between the benzene and pyridine rings are 8.23?(9)° and 52.84?(12)°. Both the mol-ecules exist in an E configuration with respect to the C=N double bond. The two mol-ecules in the asymmetric unit are linked via weak C-H?O hydrogen bonds. In both the mol-ecules, an intra-molecular O-H?N hydrogen bond generate an S(6) graph-set motif. In the crystal, inter-molecular N-H?O and C-H?O hydrogen bonds generate bifurcated R(1) (2)(7) ring motifs. The crystal packing is further stabilized by weak inter-molecular N-H?O, N-H?N, C-H?O and ?-? [centroid-centroid distance 3.615?(2)?Å] inter-actions.

| S-EPMC3201283 | biostudies-literature

N'-(2-Hydroxy-benzyl-idene)-2-methoxy-benzohydrazide monohydrate.

Project description:In the title compound, C(15)H(14)N(2)O(3)·H(2)O, the Schiff base mol-ecule is approximately planar, with a dihedral angle between the two aromatic rings of 10.2?(3)°. The mol-ecular structure is stabilized by O-H?N and N-H?O hydrogen bonds. In the crystal structure, the Schiff base and water mol-ecules are linked together by inter-molecular O-H?O hydrogen bonds, forming chains parallel to the a axis.

| S-EPMC2960617 | biostudies-literature

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

Project description:In the title compound, C(16)H(16)N(2)O(4)·H(2)O, the dihedral angle between the two aromatic rings is 19.6?(2)°. In the crystal structure, mol-ecules are linked into a three-dimensional network by inter-molecular N-H?O, O-H?N and O-H?O hydrogen bonds.

| S-EPMC2970025 | biostudies-literature

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.

| S-EPMC2970332 | biostudies-literature

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.

| S-EPMC2959458 | biostudies-literature

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