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Crystal structure of (E)-N-[(2-meth-oxy-naphthalen-1-yl)methyl-idene]-3-nitro-aniline.

ABSTRACT: In the title compound, C18H14N2O3, the dihedral angle between the naphthalene ring system and the benzene ring is 59.99 (13)°. A short intra-molecular C-H⋯N contact closes an S(6) ring. The nitro group is disordered over two orientations in a statistical ratio. In the crystal, weak C-H⋯O hydrogen bonds and very weak π-π stacking inter-actions [centroid-centroid separation = 3.9168 (17) Å] are observed.

SUBMITTER: Bhai R D

PROVIDER: S-EPMC4719912 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4-Meth-oxy-N-[(E)-(5-nitro-thio-phen-2-yl)methyl-idene]aniline.

Project description:The title mol-ecule, C(12)H(10)N(2)O(3)S, is nonplanar with an inter-planar angle of 33.44?(7)° between the benzene and thio-phene rings. In the crystal there exist only weak inter-molecular C-H?O inter-actions, ?-? inter-actions between the benzene rings [centroid-centroid distance = 3.7465?(14)?Å] and X-Y?? inter-actions to the thio-phene and benzene rings [N?centroid distances = 3.718?(3) and 3.355?(3)?Å, respectively]. Inter-molecular C-H?O inter-actions link the mol-ecules into chains parallel to the a axis.

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Project description:The dihedral angle between the benzene and thio-phene rings in the title compound, C(12)H(10)N(2)O(3)S, is 27.94?(13)°. An inter-molecular C-H?? inter-action contributes to the stability of the crystal structure.

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(Z)-3-Meth-oxy-N-[(5-nitro-thio-phen-2-yl)methyl-idene]aniline.

Project description:In the title compound, C(12)H(10)N(2)O(3)S, the dihedral angle between the benzene and thio-phene rings is 43.17 (4)°. The crystal structure is devoid of any hydrogen-bonding inter-actions. However, π-π inter-actions between the benzene and thio-phene rings [distance between ring centroids = 3.6850 (11) Å] stack the mol-ecules along the a axis. The absolute structure could not be determined as the crystal studied was a racemic twin with a BASF parameter of 0.31 (6).

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Project description:The title compound, C12H9N3O2, adopts an E conformation at the imine double bond. The pyridyl ring makes a dihedral angle of 47.78 (5)° with the benzene ring, indicating the mol-ecule is twisted. In the crystal, mol-ecules are π-π stacked into columns parallel to [100], with an inter-planar separation of 3.8537 (8) Å, corresponding to the length of the a axis. The chains are further linked via weak C-H⋯O and C-H⋯N hydrogen bonds, forming two-dimensional sheets parallel to (010). The sheets interact by van der Waals inter-actions.

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Crystal structure of (2E)-2-meth-oxy-imino-2-{2-[(2-methyl-phen-oxy)meth-yl]phen-yl}-N'-(4-nitro-benzyl-idene)ethano-hydrazide.

Project description:The title compound, C24H22N4O5, crystallizes with two mol-ecules in the asymmetric unit (Z' = 2) oriented almost perpendicular to each other [dihedral angle between the central core of each mol-ecule = 77.95 (3)°]. The two mol-ecules exhibit similar conformations with an extended structure. An intra-molecular C-H⋯N hydrogen bond occurs in each mol-ecule. The two mol-ecules are linked by a bifurcated N-H⋯(O,N) hydrogen bond involving the NH group in mol-ecule A as donor. They are further linked into a ribbon along the a-axis direction by further bifurcated N-H⋯(O,N) hydrogen bonds involving the NH group in mol-ecule B as donor. C-H⋯O inter-actions are also observed.

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Project description:In the title compound, C(21)H(21)NO, the dihedral angle between the naphthalene ring system and the benzene ring is 64.61?(6)°. The mol-ecular structure is stabilized by an intra-molecular C-H?N hydrogen bond.

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(E)-3-Chloro-N-[(2-eth-oxy-naphthalen-1-yl)methyl-idene]aniline.

Project description:In the title compound, C(19)H(16)ClNO, the dihedral angle between the naphthalene ring system and the chloro-benzene ring is 61.90 (10)° and the C-N-C-C torsion angle is 174.6 (2)°. The mol-ecular structure is stabilized by an intra-molecular C-H⋯N hydrogen bond. The crystal structure features π-π stacking inter-actions [centroid-centroid distances = 3.7325 (17) and 3.8150 (17) Å].

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Crystal structure of 1-((1E)-{(E)-2-[(2-hydroxy-naphthalen-1-yl)methyl-idene]hydrazin-1-yl-idene}meth-yl)naphthalen-2-ol.

Project description:The complete mol-ecule of the title compound, C22H16N2O2, is generated by a crystallographic inversion centre at the mid-point of the central N-N bond. Two intra-molecular O-H⋯N hydrogen bonds occur.

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2-Fluoro-N'-[(2-meth-oxy-naphthalen-1-yl)methyl-idene]benzohydrazide.

Project description:The asymmetric unit of the title compound, C(19)H(15)FN(2)O(2), contains two mol-ecules, A and B, in which the dihedral angles between the ring systems are 46.4?(2) and 17.24?(14)°, respectively. In the crystal, mol-ecules are linked into [010] chains of alternating A and B species by N-H?O hydrogen bonds.

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3-Chloro-N'-[(2-meth-oxy-naphthalen-1-yl)methyl-idene]benzohydrazide.

Project description:The title compound, C(19)H(15)ClN(2)O(2), was prepared by the reaction of 2-meth-oxy-1-naphthaldehyde with 3-chloro-benzohydrazide in methanol. The dihedral angle between the benzene ring and the naphthyl ring system is 69.0 (3)°. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into chains along the c axis. The crystal packing exhibits π-π inter-actions, as indicated by distances of 3.768 (3) Å between the centroids of the naphthyl rings of neighbouring mol-ecules.

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