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(E)-4-Amino-N'-(2-hy-droxy-5-methyl-benzyl-idene)benzohydrazide.

ABSTRACT: The asymmetric unit of the title compound, C(15)H(15)N(3)O(2), comprises two crystallographically independent mol-ecules (A and B), each having an E conformation around the C=N bond. In each mol-ecule, there is an intra-molecular O-H⋯N hydrogen bond making an S(6) ring motif. The dihedral angles between the substituted phenyl rings are 17.49 (9) and 10.03 (9)°. In the crystal, N-H⋯O hydrogen bonds link neighbouring independent mol-ecules into infinite chains, of the type -A-B-A-B-, along the a axis, enclosing R(2) (1)(7) ring motifs. The chains are linked by N-H⋯O hydrogen bonds and C-H⋯O inter-actions, leading to the formation of a three-dimensional network.

SUBMITTER: Kargar H

PROVIDER: S-EPMC3393987 | biostudies-literature |

REPOSITORIES: biostudies-literature

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N'-(4-Diethyl-amino-2-hy-droxy-benzyl-idene)-4-methyl-benzohydrazide.

Project description:The title compound, C(19)H(23)N(3)O(2), was prepared by condensing 4-diethyl-amino-2-hy-droxy-benzaldehyde and 4-methyl-benzo-hydrazide in methanol. The asymmetric unit contains two independent mol-ecules in which the two benzene rings make dihedral angles of 30.3?(3) and 18.9?(3)°. Intra-molecular O-H?N hydrogen bonds are observed in both mol-ecules. The crystal structure is stabilized by N-H?O hydrogen bonds, which form chains along the a axis.

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2-Hy-droxy-N'-(4-hy-droxy-benzyl-idene)-3-methyl-benzohydrazide.

Project description:The title compound, C(15)H(14)N(2)O(3), was prepared by condensing 4-hy-droxy-benzaldehyde and 2-hy-droxy-3-methyl-benzo-hydra-zide in methanol. The two benzene rings make a dihedral angle of 19.03 (11)°. An intra-molecular O-H⋯O hydrogen bond is observed. The crystal structure is stabilized by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds and C-H⋯O inter-actions, which lead to the formation of a three-dimensional network.

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N'-(4-Hy-droxy-benzyl-idene)-2-methyl-benzohydrazide.

Project description:The title hydrazone compound, C(15)H(14)N(2)O(2), was prepared by the condensation of 4-hy-droxy-benzaldehyde with 2-methyl-benzohydrazide in methanol. The dihedral angle between the two benzene rings is 42.3?(2)°. In the crystal structure, mol-ecules are linked by inter-molecular O-H?O, O-H?N and N-H?O hydrogen bonds, forming a three-dimensional framework.

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N'-(2-Hy-droxy-benzyl-idene)-3-methyl-benzohydrazide.

Project description:The title compound, C(15)H(14)N(2)O(2), is the product of the reaction of 2-hy-droxy-benzaldehyde and 3-methyl-benzo-hydrazide. The dihedral angle between the substituted benzene rings is 19.5?(3)° and an intra-molecular O-H?N hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked by N-H?O hydrogen bonds to generate C(4) chains propagating in [001] and C-H?O inter-actions to the same O-atom acceptor reinforce the chains.

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2-Hy-droxy-N'-(5-hy-droxy-2-nitro-benzyl-idene)-3-methyl-benzohydrazide.

Project description:The title compound, C(15)H(13)N(3)O(5), was prepared by condensing 5-hy-droxy-2-nitro-benzaldehyde and 2-hy-droxy-3-methyl-benzohydrazide in methanol. The two benzene rings make a dihedral angle of 3.9?(3)°. An intra-molecular O-H?O hydrogen bond is observed. The crystal structure is stabilized by inter-molecular O-H?O and N-H?O hydrogen bonds, and C-H?O and ?-? inter-actions [centroid-centroid distances = 3.5658?(17)-3.9287?(19)?Å].

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N'-(3-Eth-oxy-2-hy-droxy-benzyl-idene)-2-hy-droxy-3-methyl-benzohydrazide.

Project description:The title compound, C(17)H(18)N(2)O(4), crystallizes with two independent mol-ecules in the asymmetric unit. The two benzene rings in each mol-ecule make dihedral angles of 7.6?(3) and 3.9?(3)°. Intra-molecular O-H?N and O-H?O hydrogen bonds are present in each mol-ecule. In the crystal, N-H?O hydrogen bonds link the mol-ecules into chains propagating in [010]. The are also a number of C-H?O and ?-? inter-actions present [centroid-centroid distances = 3.874?(4) and 3.904?(3)?Å], that result in the formation of a three-dimensional network.

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N'-(2-Hy-droxy-3,5-diiodo-benzyl-idene)-2-methyl-benzohydrazide.

Project description:The asymmetric unit of the title compound, C(15)H(12)I(2)N(2)O(2), contains two independent mol-ecules in which the dihedral angles between the two benzene rings are 62.4?(7) and 41.1?(7)°. Intra-molecular O-H?N hydrogen bonds generate S(6) ring motifs in each mol-ecule. In the crystal, mol-ecules are linked through inter-molecular N-H?O hydrogen bonds, forming chains along the a axis.

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N'-(5-Bromo-2-hy-droxy-benzyl-idene)-4-methyl-benzohydrazide.

Project description:The mol-ecule of the title compound, C(15)H(13)BrN(2)O(2), displays an E conformation with respect to the C=N double bond and the dihedral angle between the planes of the benzene rings is 3.1?(2)°. An intra-molecular O-H?N inter-action generates an S(6) ring. In the crystal, mol-ecules are linked by N-H?O hydrogen bonds, forming C(4) chains along the c-axis direction.

| S-EPMC3247477 | biostudies-literature

N'-(3,5-Dibromo-2-hy-droxy-benzyl-idene)-2-methyl-benzohydrazide.

Project description:The asymmetric unit of the title compound, C(15)H(12)Br(2)N(2)O(2), contains two independent mol-ecules in which the dihedral angles between the benzene rings are 49.5?(7) and 66.4?(7)°. Intra-molecular O-H?N hydrogen bonds generate S(6) ring motifs in each mol-ecule. In the crystal, mol-ecules are linked through inter-molecular N-H?O hydrogen bonds, forming chains along the b axis.

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(E)-N'-(5-Bromo-2-hy-droxy-benzyl-idene)-3-methyl-benzohydrazide.

Project description:In the title mol-ecule, C(15)H(13)BrN(2)O(2), an intra-molecular O-H?N hydrogen bond influences the mol-ecular conformation; the two benzene rings form a dihedral angle of 13.6?(3)°. In the crystal, inter-molecular N-H?O hydrogen bonds link the mol-ecules into chains along the a axis and weak inter-molecular C-H?O hydrogen bonds further link these chains into layers parallel to the ac plane.

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