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2-(3,5-Dimethyl-1H-pyrazol-1-yl)-2-hy-droxy-imino-N'-[1-(pyridin-2-yl)ethyl-idene]acetohydrazide.

ABSTRACT: In the title compound, C14H16N6O2, the dihedral angles formed by the mean plane of the acetohydrazide group [maximum deviation 0.0629 (12) Å] with the pyrazole and pyridine rings are 81.62 (6) and 38.38 (4)° respectively. In the crystal, mol-ecules are connected by N-H⋯O and O-H⋯N hydrogen bonds into supra-molecular chains extending parallel to the c-axis direction.

SUBMITTER: Plutenko MO

PROVIDER: S-EPMC3588977 | biostudies-literature |

REPOSITORIES: biostudies-literature

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A second monoclinic polymorph of 2-(3,5-dimethyl-1H-pyrazol-1-yl)-2-hy-droxy-imino-N'-[1-(pyridin-2-yl)ethyl-idene]acetohydrazide.

Project description:The title compound, C14H16N6O2, is a second monoclinic polymorph of 2-[1-(3,5-dimeth-yl)pyrazol-yl]-2-hy-droxy-imino-N'-[1-(2-pyrid-yl)ethyl-idene] acetohydrazide, with two crystallographically independent mol-ecules per asymmetric unit. The non-planar mol-ecules are chemically equal having similar geometric parameters. The previously reported polymorph [Plutenko et al. (2012 ?). Acta Cryst. E68, o3281] was described in space group Cc (Z = 4). The oxime group and the O atom of the amide group are anti with respect to the C-C bond. In the crystal, mol-ecules are connected by N-H?N hydrogen bonds into zigzag chains extending along the b axis.

| S-EPMC3648291 | biostudies-literature

Crystal structure of 2-hy-droxy-imino-2-(pyridin-2-yl)-N'-[1-(pyridin-2-yl)ethyl-idene]acetohydrazide.

Project description:The mol-ecule of the title compound, C14H13N5O2, is approximately planar (r.m.s deviation for all non-H atoms = 0.093?Å), with the planes of the two pyridine rings inclined to one another by 5.51?(7)°. The oxime group is syn to the amide group, probably due to the formation of an intra-molecular N-H?N hydrogen bond that forms an S(6) ring motif. In the crystal, mol-ecules are linked by pairs of bifurcated O-H?(O,N) hydrogen bonds, forming inversion dimers. The latter are linked via C-H?O and C-H?N hydrogen bonds, forming sheets lying parallel to (502). The sheets are linked via ?-? stacking inter-actions [inter-centroid distance = 3.7588?(9)?Å], involving the pyridine rings of inversion-related mol-ecules, forming a three-dimensional structure.

| S-EPMC4257442 | biostudies-other

2-Cyano-N'-[1-(2-hy-droxy-phen-yl)ethyl-idene]acetohydrazide monohydrate.

Project description:The title compound, C(11)H(11)N(3)O(2)·H(2)O, was obtained by the reaction of 2-acetyl-phenol with cyano-acetohydrazide in methanol. The asymmetric unit contains two hydrazone mol-ecules and two water mol-ecules of crystallization. There is an intra-molecular O-H?N hydrogen bond in each hydrazone mol-ecule. The crystal structure is stabilized by inter-molecular N-H?O, O-H?O and O-H?N hydrogen bonds.

| S-EPMC3247401 | biostudies-literature

2-Cyano-N'-[1-(pyridin-2-yl)ethyl-idene]acetohydrazide.

Project description:In the title compound, C(10)H(10)N(4)O, the dihedral angle between the pyridine ring and the -C=O(CH(2))CN group is 24.08?(12)°. In the crystal, inversion dimers linked by pairs of N-H?N hydrogen bonds generate R(2) (2)(8) loops.

| S-EPMC3515292 | biostudies-literature

(E)-N-Ethyl-2-[(E)-3-(hy-droxy-imino)-butan-2-yl-idene]hydrazinecarbothio-amide.

Project description:In the crystal structure of the title compound, C(7)H(14)N(4)OS, mol-ecules are linked through N-H⋯S and O-H⋯N hydrogen bonds and C-H⋯S interactions, forming chains propagating along [21-1].

| S-EPMC3414996 | biostudies-literature

(Tris{2-[(5-hy-droxy-pyridin-2-yl-?N)methyl-idene-imino-?N]eth-yl}amine)-zinc dinitrate.

Project description:In the complex cation of the title compound, [Zn(C(24)H(27)N(7)O(3))](NO(3))(2), the tripodal tris-{[2-(5-hy-droxy-pyridin-2-yl)methyl-idene-imino]-eth-yl}amine ligand is coordin-ated to the Zn atom through the three pyridine and three imino N atoms. The coordination sphere of the Zn atom is based on an octahedron with a significant distortion towards trigonal prismatic, the twist angle being 45.58?(9)°. The crystal packing is formed by L and D anti-podes arranged in layers disposed parallel to the b axis. Strong O-H?O hydrogen bonding exists between the hy-droxy groups of the ligand and the nitrate anion.

| S-EPMC3238702 | biostudies-literature

2,4-Dichloro-6-({2-[(3,5-dichloro-2-hy-droxy-benzyl-idene)amino]-eth-yl}imino-meth-yl)phenol.

Project description:The title mol-ecule, C(16)H(12)Cl(4)N(2)O(2), lies about an inversion center. The symmetry-unique part of the mol-ecule contains an intra-molecular O-H?N hydrogen bond. In the crystal, mol-ecules are arranged in corrugated layers parallel to (-101). Weak ?-? stacking inter-actions, with a centroid-centroid diatance of 3.7923?(13)?Å, are present.

| S-EPMC3379294 | biostudies-literature

4-Hy-droxy-N'-[1-(2-hy-droxy-phen-yl)ethyl-idene]benzohydrazide.

Project description:In the title compound, C(15)H(14)N(2)O(3), there is an intra-molecular O-H?N hydrogen bond and the dihedral angle between the two aromatic rings is 13.9?(3)°. In the crystal structure, mol-ecules are stabilized by inter-molecular O-H?O and N-H?O hydrogen bonds.

| S-EPMC2979514 | biostudies-literature

(E)-2-{[2-(2-Hy-droxy-ethyl-amino)-ethyl-imino]-meth-yl}phenol.

Project description:The asymmetric unit of the title compound, C(11)H(16)N(2)O(2), contains two independent conformational isomers which show intra-molecular aromatic-imine O-H⋯N hydrogen bonds. In the crystal, neighboring mol-ecules are linked through inter-molecular aliphatic-aliphatic O-H⋯N, aliphatic-aromatic N-H⋯O and C-H⋯O inter-actions into hydrogen-bonded layers parallel to the ab plane.

| S-EPMC3247587 | biostudies-literature

2-(8-Bromo-imidazo[1,2-a]pyridin-2-yl)-N'-[(E)-4-diethyl-amino-2-hy-droxy-benzyl-idene]acetohydrazide dihydrate.

Project description:In the title compound, C(20)H(22)BrN(5)O(2)·2H(2)O, the Schiff base mol-ecule exists in an E conformation with respect to the acyclic C=N bond. An S(6) ring motif is formed via an intra-molecular O-H⋯N hydrogen bond. The dihedral angle between the imidazo[1,2-a]pyridine system and the benzene ring is 84.62 (5)°. In the crystal, N-H⋯O, O-H⋯O, O-H⋯N, C-H⋯O and C-H⋯Br hydrogen bonds link the mol-ecules into a three-dimensional network. The crystal packing is further stabilized by C-H⋯π and π-π inter-actions [centroid-centroid distance = 3.5365 (7) Å].

| S-EPMC3297878 | biostudies-literature

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