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3-Hydr-oxy-4-nitro-phenyl acetate.

ABSTRACT: In the mol-ecule of the title compound, C(8)H(7)NO(5), the acetate group is oriented with respect to the aromatic ring at a dihedral angle of 85.30 (3)°. An intra-molecular O-H⋯O hydrogen bond results in the formation of a non-planar six-membered ring, adopting an envelope conformation. In the crystal structure, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules.

SUBMITTER: Liu C

PROVIDER: S-EPMC2967961 | biostudies-literature |

REPOSITORIES: biostudies-literature

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

Project description:The asymmetric unit of the title compound, C(13)H(10)N(2)O(4), contains two crystallographically independent mol-ecules. The aromatic rings are oriented at dihedral angles of 24.39 (3) and 7.47 (3)° in the two mol-ecules and intra-molecular N-H⋯O and O-H⋯O hydrogen bonds result in the formation of two planar six-membered rings. In the crystal structure, inter-molecular O-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into chains, forming R(2) (2)(10) ring motifs. Weak π-π contacts between the benzene and phenyl rings [centroid-centroid distance = 3.955 (3) Å] may further stabilize the structure.

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2-Hydr-oxy-5-nitro-benzaldehyde 2,4-dinitro-phenyl-hydrazone.

Project description:In the title compound, C(13)H(9)N(5)O(7), one of the nitro groups is twisted away from the attached benzene ring by 16.21 (8)°. The dihedral angle between the two benzene rings is 4.63 (1)°. The mol-ecular structure is stabilized by intra-molecular N-H⋯O and O-H⋯N hydrogen bonds which generate an S(6) ring motif. The mol-ecules pack as layers parallel to the ab plane; mol-ecules of adjacent layers are linked into chains along the [101] direction through N-H⋯O hydrogen bonds.

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N-[(2-Hydr-oxy-1-naphthyl)(3-nitro-phenyl)meth-yl]acetamide.

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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6,8-Dibromo-5-hydr-oxy-4-oxo-2-phenyl-4H-chromen-7-yl acetate.

Project description:In the title compound, C(17)H(10)Br(2)O(5), the chromene ring is almost planar with minimal puckering [total puckering amplitude = 0.067?(4)?Å]. The dihedral angle between chromeme ring system and phenyl ring is 3.7?(2)°. The crystal structure is stabilized by intermolecular C-H?O inter-actions and an intramolecular O-H?O hydrogen bond also occurs.

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

Project description: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.

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Methyl 2-hydr-oxy-3-nitro-benzoate.

Project description:The title compound, C(8)H(7)NO(5), assumes an approximately planar mol-ecular structure with an intra-molecular O-H?O hydrogen bond between the hydr-oxy and carboxyl-ate groups. Weak inter-molecular C-H?O hydrogen bonding is present in the crystal structure.

| S-EPMC2969387 | biostudies-literature

5-Hydr-oxy-8-nitro-1,4-naphthoquinone.

Project description:The title compound, C(10)H(5)NO(5), features an intra-molecular O-H⋯O hydrogen bond, forming a six-membered ring with an S(6) ring motif. The nitro group makes a dihedral angle of 71.66 (5)° with the plane of the benzene ring to which it is bound. The two rings are almost coplanar, with a dihedral angle of 4.44 (5)°. Short inter-molecular distances between the centroids of the six-membered rings [3.7188 (6)-3.8299 (6) Å] indicate the existence of π-π inter-actions. The inter-esting features of the crystal structure are the short inter-molecular O⋯O and O⋯N inter-actions. The crystal packing is stabilized by intra-molecular O-H⋯O and inter-molecular C-H⋯O (×3) hydrogen bonds, and C-H⋯π inter-actions.

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