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4-Hydr-oxy-3-meth-oxy-5-nitro-aceto-phenone (5-nitro-apocynin).

ABSTRACT: The title mol-ecule, C(9)H(9)NO(5), is close to planar (r.m.s. deviation from the mean plane of the non-H atoms = 0.058 Å). The OH group forms a bifurcated O-H⋯(O,O) hydrogen bond, with the intra-molecular component to a nitro O atom and the inter-molecular component to a keto O atom, the latter resulting in chains along [20]. A C-H⋯O inter-action reinforces the packing.

SUBMITTER: Babu S

PROVIDER: S-EPMC2969931 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-Hydr-oxy-N'-(2-hydr-oxy-3-meth-oxy-5-nitro-benzyl-idene)-3-methyl-benzo-hydrazide.

Project description:In the title compound, C(16)H(15)N(3)O(6), the dihedral angle between the two benzene rings is 0.9?(2)°. The mol-ecule adopts an E configuration with respect to the C=N bond. There are intra-molecular O-H?N and O-H?O hydrogen bonds in the mol-ecule. In the crystal structure, mol-ecules are linked through inter-molecular N-H?O hydrogen bonds to form chains running along the c axis.

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Diethyl [hydr-oxy(2-nitro-phen-yl)-meth-yl]phospho-nate.

Project description:In the title mol-ecule, C(11)H(16)NO(6)P, the nitro group is twisted out of the mean plane of the benzene ring at 29.91?(3)°. The two ethyl groups are disordered between two orientations in the ratios 0.784?(7)/0.216?(7) and 0.733?(6)/0.267?(6). Inter-molecular O-H?O hydrogen bonds link the mol-ecules into centrosymmetric dimers.

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Dimethyl [hydr-oxy(2-nitro-phen-yl)meth-yl]phospho-nate.

Project description:In the title compound, C(9)H(12)NO(6)P, intra-molecular C-H?O hydrogen bonds form five- and six-membered rings. In the crystal, inversion dimers lined by pairs of C-H?O hydrogen bonds occur with ring motifs R(2) (2)(10). The O atom of the hydr-oxy group behaves as an accepter and the benzene ring as donor. Adjacent dimers are connected through O-H?O links.

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Project description:The title compound, C(19)H(16)N(2)O(4), is of inter-est as a precursor to biologically active substituted quinolines and related compounds. The dihedral angle between the naphthalene ring system and the benzene ring is 81.9?(1)°. The crystal structure is stabilized by N-H?O inter-molecular hydrogen bonds, linking the mol-ecules into pairs around a center of symmetry. The crystal structure is further stabilized by inter-molecular O-H?O hydrogen bonds, which link the mol-ecules into chains running along a axis. An intra-molecular C-H?O short contact is also present.

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(E)-2,4-Dihydr-oxy-N'-(2-hydr-oxy-3-meth-oxy-5-nitro-benzyl-idene)benzohydrazide dihydrate.

Project description:The asymmetric unit of the title compound, C(15)H(13)N(3)O(7)·2H(2)O, consists of a hydrazone mol-ecule and two solvent water mol-ecules. The mol-ecule adopts an E configuration with respect to the C=N bond. It is relatively planar, with a dihedral angle between the two benzene rings of 2.6?(1)°. There are intra-molecular O-H?N and O-H?O hydrogen bonds in the hydrazone mol-ecule. In the crystal structure, symmetry-related mol-ecules are linked through inter-molecular N-H?O and O-H?O hydrogen bonds to form a three-dimensional network.

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2-Hydr-oxy-3-nitro-benzamide.

Project description:The asymmetric unit of title compound, C(7)H(6)N(2)O(4), contains two mol-ecules, one of which has a disordered nitro group with an occupancy ratio of 0.517?(9):0.483?(9) for the O atoms. Both mol-ecules contain an intra-molecular O-H?O hydrogen bond. In the crystal, both mol-ecules form inversion dimers linked by pairs of N-H?O hydrogen bonds, resulting in R(2) (2)(8) ring motifs. The dimers are connected by further N-H?O links and weak C-H?O inter-actions, resulting in a layered motif.

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4-Hydr-oxy-3-nitro-benzaldehyde.

Project description:The hydroxyl group in each of the two independent mol-ecules of the title compound, C(7)H(5)NO(4), participates in two O-H?O hydrogen bonds, viz. one intra-molecular bond to the nitro group and one inter-molecular bond to the aldehyde group of the same mol-ecule in the next unit, resulting in a linear chain structure. The dihedral angle between the aromatic ring and the nitro group is 10.9?(3)° in one mol-ecule and 9.9?(2)° in the other.

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3-Hydr-oxy-N'-(5-hydr-oxy-2-nitro-benzyl-idene)-2-naphthohydrazide.

Project description:The mol-ecule of the title compound, C(18)H(13)N(3)O(5), displays an E configuration with respect to the C=N double bond. The dihedral angle between the benzene ring and the naphthyl system is 1.1?(2)°. In the crystal structure, mol-ecules are linked through inter-molecular N-H?O and O-H?O hydrogen bonds, forming a three-dimensional network.

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N-[(2-Hydr-oxy-5-methoxy-phen-yl)(3-nitro-phen-yl)meth-yl]acetamide.

Project description:In the title compound, C(16)H(16)N(2)O(5), the meth-oxy group is disordered with site occupancies of 0.20 (3) and 0.80 (3). The dihedral angle between the two aromatic rings is 73.7 (2)°. The crystal structure is characterized by intermolecular N-H⋯O, O-H⋯O, C-H⋯O and C-H⋯π hydrogen bonds.

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Project description:In the title mol-ecule, C(10)H(12)N(2)O(2), the acetohydrazide group is almost planar [within 0.0306?(12)?Å] and forms a dihedral angle of 12.15?(14)° with the benzene ring. The meth-oxy group deviates from the attached benzene ring with a C-O-C-C torsion angle of 4.2?(4)°·The mol-ecule adopts a trans configuration with respect to the C=N bond. In the crystal, mol-ecules are linked into centrosymmetric dimers by pairs of N-H?O hydrogen bonds and intermolecular C-H?O interactions further stabilize the structure.

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