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N-[1-(Biphenyl-4-yl)ethyl-idene]-N'-(2,4-dinitro-phen-yl)hydrazine.

ABSTRACT: The title compound, C(20)H(16)N(4)O(4), contains two crystallographically independent mol-ecules (A and B) in the asymmetric unit. Intra-molecular N-H?O hydrogen bonds generate S(6) ring motifs in both molecules. The dihedral angles between the nitro-substituted benzene rings and the two benzene rings in mol-ecules A and B are 14.32?(9), 17.89?(9)° and 13.04?(9) and 25.71?(9)°. The ortho and para nitro groups form dihedral angles of 6.2?(2) and 8.5?(2)° in mol-ecule A, and 5.3?(3) and 13.8?(2)° in mol-ecule B, with the benzene rings to which they are attached. The crystal structure is stabilized by inter-molecular C-H?O inter-actions.

SUBMITTER: Kia R

PROVIDER: S-EPMC2977666 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature

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N-[1-(Biphenyl-4-yl)ethyl-idene]-N'-(2,4-dinitro-phen-yl)hydrazine.

Kia Reza R Fun Hoong-Kun HK Etemadi Bijan B Kargar Hadi H

Acta crystallographica. Section E, Structure reports online 20090408 Pt 5

The title compound, C(20)H(16)N(4)O(4), contains two crystallographically independent mol-ecules (A and B) in the asymmetric unit. Intra-molecular N-H⋯O hydrogen bonds generate S(6) ring motifs in both molecules. The dihedral angles between the nitro-substituted benzene rings and the two benzene rings in mol-ecules A and B are 14.32 (9), 17.89 (9)° and 13.04 (9) and 25.71 (9)°. The ortho and para nitro groups form dihedral angles of 6.2 (2) and 8.5 (2)° in mol-ecule A, and 5.3 (3) and 13.8 (2)° ...[more]

PMID: 21584009

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(E)-1-[1-(2-Chloro-phen-yl)ethyl-idene]-2-(2,4-dinitro-phen-yl)hydrazine.

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(E)-1-(2,4-Dinitro-phen-yl)-2-[1-(2-nitro-phen-yl)ethyl-idene]hydrazine.

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(E)-1-(2,4-Dinitro-phen-yl)-2-[1-(3-nitro-phen-yl)ethyl-idene]hydrazine.

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Project description:The title compound, C(14)H(11)FN(4)O(4), crystallizes with two essentially planar mol-ecules in the asymmetric unit; the dihedral angles between the benzene rings are 1.57?(15) and 6.17?(15)°. In each mol-ecule, an intra-molecular N-H?O hydrogen bond generates an S(6) ring. In the crystal, mol-ecules are linked by weak C-H?O and C-H?F inter-actions into sheets lying parallel to (120). O?C [2.980?(4)?Å] and O?N [2.892?(3)?Å] short contacts also occur.

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Project description:There are two crystallographically independent mol-ecules in the asymmetric unit of the title compound, C(15)H(14)N(4)O(5), with different conformations for the meth-oxy groups. The mol-ecules are both slightly twisted, the dihedral angles between two benzene rings being 8.37 (18)° in one and 7.31 (18)° in the other. In both mol-ecules, the two nitro groups are essentially coplanar with their bound benzene ring, with the r.m.s. deviation of the dinitro-benzene plane being 0.0310 (3) Å in one mol-ecule and 0.0650 (3) Å in the other. In each mol-ecule, an intra-molecular N-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked by weak C-H⋯O inter-actions and stacked along the a axis through π-π inter-actions, with centroid-centroid distances of 3.651 (2) and 3.721 (2) Å. The crystal studied was a non-merohedral twin with a refined minor component of 20.1 (3)%.

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Project description:In the title compound, C(13)H(9)ClN(4)O(4), there are two crystallographically independent mol-ecules in the asymmetric unit, which have very similar conformations. The C=N-N angles in each independent mol-ecule are 115.0?(2) and 116.6?(2)°, which are significantly smaller than the ideal value of 120° expected for sp(2)-hybridized N atoms. This is probably a consequence of repulsion between the nitro-gen lone pairs and the adjacent N-N bonds. Two bifurcated intra-molecular N-H?O hydrogen bonds help to establish the mol-ecular conformation and consolidate the crystal packing.

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(E)-1-(2,4-Dinitro-phen-yl)-2-(2-fluoro-benzyl-idene)hydrazine.

Project description:In the title compound, C(13)H(9)FN(4)O(4), the dihedral angle between the mean planes of the two benzene rings of the nearly planar mol-ecule is 6.6?(9)°. The dihedral angles between the mean planes of the benzene ring and its two attached nitro groups are 6.7?(7) and 7.2?(9)°. Crystal packing is stabilized by N-H?O hydrogen bonds, weak C-H?O and C-H?F inter-molecular inter-actions and centroid-centroid ?-ring stacking inter-actions.

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1-(2,3-Dimeth-oxy-benzyl-idene)-2-(2,4-dinitro-phen-yl)hydrazine.

Project description:In the title compound, C(15)H(14)N(4)O(6), the dihedral angle between the aromatic rings is 3.7?(4)°. The nitro groups make dihedral angles of 6.0?(4) and 5.2?(4)° with the parent ring and are oriented at 6.0?(6)° with respect to each other. The meth-oxy groups are inclined at 54.0?(2) and 2.5?(3)° with respect to the benzene ring to which they are attached. In the crystal, mol-ecules are linked by weak C-H?O inter-actions. The mol-ecular conformation is consolidated by an intra-molecular N-H?O hydrogen bond.

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N-(2,4-Dinitro-phen-yl)-N'-(1-p-tolyl-ethyl-idene)hydrazine.

Project description:In the title mol-ecule, C(15)H(14)N(4)O(4), the dihedral angle between the two benzene rings is 2.21?(7)°. An intra-molecular N-H?O hydrogen bond generates an S(6) ring motif. The mean planes of the ortho- and para-nitro groups make dihedral angles of 2.17?(17) and 2.05?(16)°, respectively, with the benzene ring to which they are attached. In the crystal structure, weak inter-molecular C-H?O hydrogen bonds generate R(2) (2)(7), R(2) (2)(13) and R(2) (1)(10) ring motifs, linking symmetry-related mol-ecules into extended chains along the b axis. In addition, there are inter-molecular C?C [3.332?(2)-3.343?(2)?Å] contacts which are shorter than the sum of the van der Waals radii. The crystal structure is further stabilized by inter-molecular C-H?? and ?-? stacking inter-actions [centroid-centroid distance = 3.8090?(9)?Å].

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