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3,5-Dimeth-oxy-2-[(4-propyl-phen-yl)imino-meth-yl]phenol.

ABSTRACT: The title compound, C(18)H(21)NO(3), crystallizes in the phenol-imine tautomeric form, with the H atom attached to oxygen rather than on nitro-gen. This H atom is involved in a strong intra-molecular O-H⋯N hydrogen bond. A C-H⋯π inter-action is also present. The dihedral angle between the aromatic rings is 12.23 (7)°.

SUBMITTER: Sahin ZS

PROVIDER: S-EPMC2968940 | biostudies-literature |

REPOSITORIES: biostudies-literature

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(E)-4-[(3,5-Dimethyl-phen-yl)imino-meth-yl]-2-meth-oxy-3-nitro-phenol.

Project description:The mol-ecule of the title compound, C(16)H(16)N(2)O(4), exists in the E configuration with respect to the central C=N double bond. The dihedral angle between the two benzene rings is 2.17?(9)?Å. In the crystal, mol-ecules are linked via O-H?N hydrogen bonds into chains that propagate along the b-axis direction. There is also ?-? stacking of inversion-related mol-ecules, with inter-planar spacings of 3.479?(5)?Å and ring centroid-centroid distances of 3.876?(4)?Å.

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Project description:The title Schiff base, C(19)H(24)N(2)O(3), exists in the crystal structure in the phenol-imine tautomeric form with an intra-molecular O-H?N hydrogen bond. The planes of the aromatic rings form a dihedral angle of 36.8?(8)°. The crystal packing is characterized by C-H?O hydrogen bonds and ?-? stacking inter-actions [centroid-centroid distance = 3.478?(4)Å].

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3-Meth-oxy-2-[(E)-(4-meth-oxy-phen-yl)imino-meth-yl]phenol.

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Project description:X-ray analysis reveals that the title Schiff base compound, C(17)H(19)NO(3), possesses both OH and NH tautomeric character in its mol-ecular structure. The occupancies of the enol and keto tautomers are 0.62?(3) and 0.38?(3), respectively. The presence of the minor keto form could not be confirmed from the IR spectrum. The mol-ecule is approximately planar, the dihedral angle between the planes of the two aromatic rings being 6.97?(8)°. The mol-ecular structure of the major component is stabilized by an intra-molecular O-H?N hydrogen bond, which generates an S(6) ring motif (N-H?O hydrogen bond in the minor component).

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4-[(E)-(4-Eth-oxy-phen-yl)imino-meth-yl]phenol.

Project description:In the title compound, C(15)H(15)NO(2), the dihedral angle between the benzene rings is 52.04?(5)° and the mol-ecule has an E conformation about the central C=N bond. In the crystal, mol-ecules are connected by O-H?N hydrogen bonds, forming zigzag chains along the b axis. The crystal packing also features weak C-H?O inter-actions.

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Project description:In the crystal structure of the title compound, C(14)H(12)BrNO(2), the dihedral angle between the rings is 37.87 (10)° and the mol-ecule has an E conformation about the central C=N bond. In the crystal, mol-ecules are connected by inter-molecular O-H⋯N hydrogen bonds into zigzag chains running parallel to the b axis. The packing also features C-H⋯O inter-actions.

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