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(E)-4-Nitro-benzaldehyde oxime.

ABSTRACT: In the title compound, C(7)H(6)N(2)O(3), the planes containing the CNO and ONO atoms subtend dihedral angles of 5.47 (5) and 8.31 (5)°, respectively, with the benzene ring. In the crystal structure, inter-molecular O-H⋯N hydrogen bonds link the mol-ecules into centrosymmetric dimers with an R(2) (2)(6) graph-set motif.

SUBMITTER: Abbas A

PROVIDER: S-EPMC2979095 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2,6-Dichloro-benzaldehyde oxime.

Project description:In the title compound, C(7)H(5)Cl(2)NO, there are two mol-ecules in the asymmetric unit. The mol-ecules are essentially identical. Each mol-ecule is connected to a symmetry-related mol-ecule through an inversion center by O-H?N hydrogen bonds, building an R(2) (2)(6) graph-set motif.

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(E)-2-Bromo-benzaldehyde oxime.

Project description:The configuration of the C=N double bond of the title compound, C(7)H(6)BrNO, is E; the non-H atoms are approximately coplanar (r.m.s. deviation = 0.038?Å). In the crystal, pairs of mol-ecules are linked by a pair of O-H?N hydrogen bonds about a center of inversion, generating hydrogen-bonded dimers.

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(E)-3,5-Dimeth-oxy-benzaldehyde oxime.

Project description:In the title compound, C(9)H(11)NO(3), the oxime grouping is twisted by 12.68?(6)° with respect to the dimethoxyl-benzene ring. In the crystal, mol-ecules are linked into an infinite [100] chain via O-H?N hydrogen bonds, instead of the more common oxime packing motif of dimers with an R(2) (2)(6) graph-set motif.

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4-Methyl-3-nitro-benzaldehyde.

Project description:In the crystal structure of the title compound, C(8)H(7)NO(3), mol-ecules are linked through weak inter-molecular C-H?O hydrogen bonding.

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2-Bromo-3-nitro-benzaldehyde.

Project description:The title compound, C(7)H(4)BrNO(3), was isolated as a by-product while attempting to prepare a diselenide. There is a close intra-molecular Br?O contact [2.984?(2)?Å]. The mol-ecules form loosely associated dimers held together by weak inter-molecular Br?O inter-actions with the nitro O atoms [Br?O = 3.179?(3)?Å]. As a result of these inter-actions, there is also a close Br?Br inter-molecular contact [3.8714?(6)?Å]. In addition, there are weak inter-molecular C-H?O inter-actions. The combination of these inter-actions produces sheets which propagate in the (210) and (10) directions perpendicular to c.

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3-Nitro-benzaldehyde thio-semicarbazone.

Project description:The mol-ecule of the title compound, C(8)H(8)N(4)O(2)S, adopts an E configuration about both the C-N bonds. In the crystal structure, adjacent mol-ecules are linked by inter-molecular N-H?S hydrogen-bonding inter-actions, forming chains running parallel to the b axis.

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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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2-Hy-droxy-3-nitro-benzaldehyde.

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5-Nitro-2-(piperidin-1-yl)benzaldehyde.

Project description:In the structure of the title compound, C(12)H(14)N(2)O(3), the piperidine ring adopts a chair conformation and the aryl substitutent occupies an equatorial position.

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2-Chloro-5-nitro-benzaldehyde thio-semicarbazone.

Project description:The title Schiff base compound, C(8)H(7)ClN(4)O(2)S, was prepared by the reaction of equimolar quanti-ties of 2-chloro-5-nitro-benzaldehyde with thio-semicarbazide in methanol. The mol-ecule adopts a trans configuration with respect to the azomethine group and the dihedral angle between the benzene ring and the thio-semicarbazide group is 6.8?(3)°. In the crystal, mol-ecules are linked through inter-molecular N-H?S hydrogen bonds, forming chains propagating in [010].

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