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(E)-4-[(4-Diethyl-amino-2-hy-droxy-benzyl-idene)amino]-benzonitrile.

ABSTRACT: The title compound, C(18)H(19)N(3)O, displays an E conformation with respect to the C=N double bond. The dihedral angle between the mean planes of the two benzene rings is 24.49 (3)°. An intra-molecular O-H⋯N hydrogen bond generates an S(6) ring. In the crystal, mol-ecules are linked by nonclassical inter-molecular C-H⋯O hydrogen bonds to form an infinite one-dimensional chain along [010], generating a C(8) motif.

SUBMITTER: Chang MJ

PROVIDER: S-EPMC3297948 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-[(E)-4-Diethyl-amino-2-hy-droxy-benzyl-idene]hydrazinecarboxamide.

Project description:Two mol-ecules make up the asymmetric unit of the title compound, C(12)H(18)N(4)O(2), and both feature an intra-molecular O-H?N hydrogen bond, which generates an S(6) ring. The diethyl-amino group of one of the mol-ecules is disordered over two sets of sites in a 0.59?(2):0.41?(2) ratio. In the crystal, N-H?O hydrogen bonds link the mol-ecules into sheets lying parallel to the ac plane and C-H?? inter-actions are also observed.

| S-EPMC3275058 | biostudies-literature

(E)-4-[(4-Diethyl-amino-2-hy-droxy-benzyl-idene)amino]-benzoic acid.

Project description:In the title compound, C(18)H(20)N(2)O(3), a potential bidentate N,O-donor Schiff base ligand, the benzene rings are inclined at an angle of 12.25 (19)°. The mol-ecule has an E conformation about the C=N bond. One of the ethyl groups is disordered over two positions, with a refined site-occupancy ratio of 0.55 (1):0.45 (1). An intra-molecular O-H⋯N hydrogen bond makes an S(6) ring motif. In the crystal, pairs of O-H⋯O hydrogen bonds link mol-ecules, forming inversion dimers with R(2) (2)(8) ring motifs.

| S-EPMC3343998 | biostudies-literature

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.

| S-EPMC3344033 | biostudies-literature

3-Chloro-N'-(4-diethyl-amino-2-hy-droxy-benzyl-idene)benzohydrazide.

Project description:The asymmetric unit of the title Schiff base compound, C(18)H(20)ClN(3)O(2), contains two independent mol-ecules. An O-H⋯N hydrogen bond contributes to the planarity of each mol-ecule: the dihedral angles between the two benzene rings are 12.8 (3) and 27.2 (3)° in the two mol-ecules. In the crystal, mol-ecules are linked through inter-molecular N-H⋯O hydrogen bonds, forming chains along the a axis.

| S-EPMC3051618 | biostudies-literature

(E)-2-(4-Diethyl-amino-2-hydroxy-benzyl-idene-amino)benzonitrile.

Project description:The mol-ecule of the title compound, C(18)H(19)N(3)O, displays a trans configuration with respect to the C=N double bond. The dihedral angle between the planes of the two benzene rings is 2.62?(11)°. A strong intra-molecular O-H?N hydrogen bond stabilizes the mol-ecular conformation.

| S-EPMC2983696 | biostudies-literature

N'-(4-Diethyl-amino-2-hy-droxy-benzyl-idene)-4-(dimethyl-amino)-benzo-hydrazide methanol monosolvate.

Project description:The title compound, C(20)H(26)N(4)O(2)·CH(3)OH, was prepared by the reaction of 4-diethyl-amino-2-hy-droxy-benzaldehyde with 4-(dimethyl-amino)-benzohydrazide. The dihedral angle between the two benzene rings is 13.6 (3)° and an intra-molecular O-H⋯N hydrogen bond generates an S(6) ring. In the crystal, the hydrazone and methanol mol-ecules are linked through inter-molecular O-H⋯O and N-H⋯O hydrogen bonds, forming chains along a.

| S-EPMC3151952 | biostudies-literature

4-[(2E)-2-(2-Hy-droxy-benzyl-idene)hydrazin-1-yl]benzonitrile.

Project description:The asymmetric unit of the title Schiff base, C(14)H(11)N(3)O, contains two independent mol-ecules which have similar conformations. The dihedral angles between the benzene rings are 4.19?(9) and 14.18?(9)° in the two mol-ecules. An intra-molecular O-H?N hydrogen bond stabilizes the mol-ecular conformation of each mol-ecules. The crystal packing is dominated by pairs of equivalent N-H?N and C-H?O hydrogen bonds which arrange the mol-ecules into layers parallel to (-111).

| S-EPMC3470239 | biostudies-literature

N'-[(1E)-4-Diethyl-amino-2-hy-droxy-benz-idene]benzohydrazide.

Project description:In the title compound, C(18)H(21)N(3)O(2), the dihedral angle between the phenyl and benzene rings is 36.85 (10)°. The methyl C atom of one of the ethyl groups is disordered over two positions with site occupancies of 0.810 (8) and 0.190 (8). The mol-ecular structure is stabilized by a classical intra-molecular O-H⋯N hydrogen bond. The crystal structure exhibits weak inter-molecular N-H⋯O, C-H⋯O and C-H⋯π inter-actions.

| S-EPMC3201289 | biostudies-literature

4-[(E)-(4-Diethyl-amino-2-hy-droxy-benzyl-idene)amino]-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one.

Project description:In the title compound, C(22)H(26)N(4)O(2), the phenyl ring and hy-droxy-benzene group are twisted with respect to the central pyrazolone ring, making dihedral angles of 54.05?(5) and 21.80?(6)°, respectively. One of the ethyl groups is disordered over two positions with site occupancies of 0.872?(6) and 0.128?(6). The mol-ecular structure features short intra-molecular O-H?N and C-H?O contacts. The crystal packing exhibits weak inter-molecular C-H?O and C-H?? inter-actions.

| S-EPMC3201426 | biostudies-literature

(E)-3-[(4-Diethyl-amino-2-hydroxy-benzyl-idene)amino]benzonitrile.

Project description:The mol-ecule of the title compound, C(18)H(19)N(3)O, displays a trans configuration with respect to the C=N double bond. There is a strong intra-molecular O-H?N hydrogen-bonding inter-action between the hydr-oxy group and imine N atom. The dihedral angle between the aromatic rings is 30.35?(8)°. The crystal packing is stabilized by O-H?N links.

| S-EPMC2972081 | biostudies-other

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