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2,4-Dinitro-benzaldehyde hydrazone.

ABSTRACT: The title compound, C(7)H(6)N(4)O(4), plays an important role in the synthesis of biologically active compounds. The planar hydrazone group is oriented at a dihedral angle of 8.27 (3)° with respect to the benzene ring. In the crystal structure, inter-molecular N-H⋯O and N-H⋯N hydrogen bonds link the mol-ecules.

SUBMITTER: Zhang N

PROVIDER: S-EPMC2960920 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2,4-Dichloro-benzaldehyde 2,4-dinitro-phenyl-hydrazone.

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Project description:In the title compound, C(14)H(12)N(4)O(5), an intra-molecular N-H?O hydrogen bond generates an S(6) ring motif. The dihedral angle between the two benzene rings is 3.91?(3)°, which shows the mol-ecule is almost planar. The para-nitro group is twisted from the benzene ring to which it is attached, making a dihedral angle of 8.50?(9)°. In the crystal structure, mol-ecules are linked together by inter-molecular C-H?O and inter-molecular three-centred O?O [2.8646?(12)-2.9213?(11)?Å] and O?N [3.0518?(11)?Å] inter-actions. The crystal structure is further stabilized by inter-molecular ?-? inter-actions [centroid-to-centroid distances 3.5708?(6)-3.9728?(12)?Å].

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3-Penta-none 2,4-dinitro-phenyl-hydrazone.

Project description:Crystals of the title compound, C(11)H(14)N(4)O(4), were obtained from a condensation reaction of 2,4-dinitro-phenyl-hydrazine and 3-penta-none. In the crystal structure, the mol-ecule, except one methyl group, displays a nearly planar structure. The imino group links to the adjacent nitro group via intra-molecular hydrogen bonding. The partially overlapped arrangement and face-to-face separation of 3.410?(9)?Å between parallel benzene rings indicate the existence of ?-? stacking between adjacent mol-ecules. The crystal structure also contains weak inter-molecular C-H?O hydrogen bonding.

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Project description:Crystals of the title compound, C(12)H(10)N(4)O(5), were obtained from a condensation reaction of 2,4-dinitro-phenyl-hydrazine and 2-furyl methyl ketone. The mol-ecule displays a nearly planar structure, and the furan ring is slightly twisted by a dihedral angle of 12.62?(6)° with respect to the phenyl-hydrazone plane. The face-to-face separation of 3.287?(7)?Å between parallel benzene rings of adjacent mol-ecules indicates the existence of ?-? stacking between dinitro-phenyl rings in the crystal structure.

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(E)-1-Phenyl-butan-2-one (2,4-dinitro-phen-yl)hydrazone.

Project description:In the title compound, C(16)H(16)N(4)O(4), the dihedral angle between the aromatic rings is 79.04?(8)° and an intra-molecular N-H?O hydrogen bond occurs. In the crystal, weak C-H.·O and C-H..? inter-actions link the mol-ecules, forming sheets.

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Project description:In the approximately planar molecule of the title compound, C(11)H(8)N(4)O(4)S, the dihedral angle between the thio-phene and benzene rings is 5.73?(10)°. In the crystal structure, bifurcated inter/intra-molecular N-H?(O,O) hydrogen bonds are present. The intermolecular links lead to inversion dimers containing an R(2) (2)(12) graph-set motif.

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(E)-Methyl 1,3-thia-zol-2-yl ketone 2,4-dinitro-phenyl-hydrazone.

Project description:Crystals of the title compound, C(11)H(9)N(5)O(4)S, were obtained from a condensation reaction of 2,4-dinitro-phenyl-hydrazine and methyl 1,3-thia-zol-2-yl ketone. Excluding two methyl H atoms, the mol-ecule displays a planar structure, the dihedral angle between the terminal thia-zole and benzene rings being 1.82?(8)°. The imino group links with adjacent nitro and thia-zole groups by intra-molecular bifurcated hydrogen bonding. The centroid-centroid separation of 3.7273?(11)?Å between nearly parallel benzene and thia-zole rings of adjacent mol-ecules indicates the existence of ?-? stacking in the crystal structure. Weak inter-molecular C-H?O hydrogen bonding is also observed.

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