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(Z)-4-(2-Hy-droxy-benzyl-idene)-1-methyl-2-phenyl-1H-imidazol-5(4H)-one.

ABSTRACT: In the title compound, C(17)H(14)N(2)O(2), the asymmetric unit comprises two mol-ecules that are comformationally similar [the dihedral angles between the phenyl rings in each are 46.35 (2) and 48.04 (3)°], with the conformation stabilized by intra-molecular O-H⋯N hydrogen bonds, which generate S(7) rings. In the crystal, inversion-related mol-ecules are linked by pairs of weak C-H⋯O hydrogen bonds, forming dimers with an R(2) (2)(16) graph-set motif. Weak inter-ring π-π stacking is observed in the structure, the shortest centroid-to-centroid distance being 3.7480 (13) Å.

SUBMITTER: Chang MJ

PROVIDER: S-EPMC3297947 | biostudies-literature |

REPOSITORIES: biostudies-literature

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(Z)-1-(2-Hy-droxy-eth-yl)-4-(2-meth-oxy-benzyl-idene)-2-methyl-1H-imidazol-5(4H)-one.

Project description:In the title compound, C14H16N2O3, an analog of the chromophore in green fluorescent protein, the meth-oxy-phenyl substituent and the imidazole N adopt a Z conformation with respect to the C=C bond. Aside from the hy-droxy-ethyl group, the mol-ecule is approximately planar, with the five- and six-membered ring planes forming a dihedral angle of 9.3?(1)°. An intra-molecular C-H?N contact occurs. In the crystal, O-H?N hydrogen bonds link the mol-ecules, forming chains along the b-axis direction. C-H?O hydrogen bonds are also observed.

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4-[(3-Hy-droxy-anil-ino)-(phenyl)-methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title compound, C(23)H(19)N(3)O(2), the dihedral angles formed by the pyrazolone ring with the three benzene rings are 30.91?(6), 60.96?(4) and 57.01?(4)°. The ligand is in the enamine-keto form and its structure is stabilized by an intra-molecular N-H?O hydrogen bond. In the crystal, O-H?N hydrogen bonds link mol-ecules into chains parallel to [01-1].

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(Z)-4-{1-[(2-Hy-droxy-ethyl)-amino]-ethyl-idene}-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:In the title compound C(14)H(17)N(3)O(2), the dihedral angle between the rings is 16.68?(13)°. Although the compound crystallizes in the keto form, the possibility of keto-enamine-enol-imine tautomerism is explained by a strong intra-molecular N-H?O hydrogen bond.

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4-[(E)-(4-Hy-droxy-benzyl-idene)amino]-3-methyl-1H-1,2,4-triazole-5(4H)-thione.

Project description:The title compound, C10H10N4OS, is nearly planar with the mean planes of the hy-droxy-benzyl and triazole rings inclined at an angle of only 3.2 (7)°. In the crystal, O-H⋯N hydrogen bonds between the hy-droxy group and the triazole ring in concert with weak N-H⋯S inter-molecular inter-actions between the triazole ring and thione group form chains along [-210] enclosing R 2 (2)(8) graph-set motifs. A weak intra-molecular C-H⋯S inter-action and inter-molecular π-π inter-actions [centroid-centroid distance = 3.5990 (15) Å] are also observed.

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1-[(4-Hy-droxy-anilino)methyl-idene]naphthalen-2(1H)-one.

Project description:The title Schiff base, C17H13NO2, crystallizes in the zwitterionic form and an N-H?O hydrogen bond closes an S(6) ring. The dihedral angle between the aromatic ring systems is 15.62?(9)°. In the crystal, O-H?O hydrogen bonds link the mol-ecules into C(11) chains propagating in [010].

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4-Hy-droxy-1-methyl-3-phenyl-quinolin-2(1H)-one.

Project description:In the title compound, C(16)H(13)NO(2), the quinoline system is approximately planar with a maximum deviation from the least-squares plane of 0.059?(1)?Å for the N atom. The phenyl ring is rotated by 62.16?(4)° with respect to the plane of the quinoline system. In the crystal, O-H?O hydrogen bonds link mol-ecules into infinite chains running along the b-axis direction.

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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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2-Benzyl-3-hy-droxy-3-methyl-2,3-dihydro-1H-isoindol-1-one.

Project description:In the title compound, C(16)H(15)NO(2), the isoindoline ring system is approximately planar (mean deviation = 0.0186?Å) and makes a dihedral angle of 61.91?(4)° with the phenyl ring. In the crystal, mol-ecules form inversion dimers via pairs of O-H?O hydrogen bonds.

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4-[(Z)-(n-Butyl-amino)(phenyl)methyl-idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.

Project description:The title compound, C(21)H(23)N(3)O, exists in an enamine-keto form with the amino group involved in an intra-molecular N-H⋯O hydrogen bond. The dihedral angle between the phenyl rings is 73.59 (6)°. The five-membered ring is nearly planar, the largest deviation being 0.0004 (7) Å, and makes dihedral angles of 4.81 (6) and 69.81 (5)° wth the phenyl rings. In the crystal, pairs of weak C-H⋯O inter-actions link the mol-ecules into centrosymmetric dimers.

| S-EPMC3343944 | 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

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