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1-Phenyl-3-(2,4,6-trimethoxy-phen-yl)prop-2-en-1-one.

ABSTRACT: In the title compound, C(18)H(18)O(4), the dihedral angle between the mean planes of the aromatic rings is 7.39?(6)°. The dihedral angles between the linking C-C=C-C plane and the phenyl and benzene rings are 11.27?(5) and 4.20?(5)°, respectively.

SUBMITTER: Liu Y

PROVIDER: S-EPMC2971127 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature

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1-Phenyl-3-(2,4,6-trimethoxy-phen-yl)prop-2-en-1-one.

Liu Ying Y Zhang Xianxi X Xue Zechun Z Lv Chunyan C

Acta crystallographica. Section E, Structure reports online 20091013 Pt 11

In the title compound, C(18)H(18)O(4), the dihedral angle between the mean planes of the aromatic rings is 7.39 (6)°. The dihedral angles between the linking C-C=C-C plane and the phenyl and benzene rings are 11.27 (5) and 4.20 (5)°, respectively. ...[more]

PMID: 21578321

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1-Phenyl-3-(2,4,6-trimethoxy-phen-yl)prop-2-en-1-one.

Project description:In the title compound, C(18)H(18)O(4), a derivative of biologically active chalcones, the dihedral angle between the two rings is 7.43?(7)°. The molecule adopts an E configuration about the central olefinic bonds. In the crystal, there are no strong inter-actions between the mol-ecules.

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(E)-1-(4-Bromo-phen-yl)-3-(2,4,6-trimethoxy-phen-yl)prop-2-en-1-one.

Project description:The mol-ecule of the title chalcone derivative, C(18)H(17)BrO(4), is twisted, the dihedral angle between the 4-bromo-phenyl and 2,4,6-trimethoxy-phenyl rings being 39.17?(6)°. The three meth-oxy groups are oriented in two different conformations whereby two meth-oxy groups are coplanar, whereas the third is twisted with respect to the attached benzene ring [C-O-C-C torsion angles of -2.84?(18), -2.80?(18) and -9.31?(18)°]. Weak intra-molecular C-H?O inter-actions generate two S(5) and one S(6) ring motifs. In the crystal structure, mol-ecules are linked into supra-molecular sheets parallel to the bc plane by weak C-H?O inter-actions. These sheets are stacked along the a axis. The crystal structure is further stabilized by weak C-H?? inter-actions.

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(E)-1-(4-Bromo-phen-yl)-3-(3,4,5-trimethoxy-phen-yl)prop-2-en-1-one.

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(E)-1-(Thio-phen-2-yl)-3-(2,4,6-tri-meth-oxy-phen-yl)prop-2-en-1-one.

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(E)-3-(6-Nitro-benzo[d][1,3]dioxol-5-yl)-1-(2,4,6-trimethoxy-phen-yl)prop-2-en-1-one.

Project description:In the mol-ecule of the title compound, C(19)H(17)NO(8), the benzodioxole unit is oriented at a dihedral angle of 61.45?(6)° with respect to the meth-oxy-substituted phenyl ring. The nitro group is not co-planar to the benzene ring to which it is attached, making a dihedral angle of 31.86?(17)°. In the crystal structure, inter-molecular C-H?O inter-actions link the mol-ecules into chains through R(2) (2)(8) ring motifs. The ??? contacts between the benzodioxole rings, [centroid-centroid distances = 3.7610?(9), 3.6613?(9) and 3.7975?(9)?Å] may further stabilize the structure.

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(2E)-1-(Pyridin-2-yl)-3-(2,4,6-trimeth-oxy-phen-yl)prop-2-en-1-one.

Project description:The title heteroaryl chalcone derivative, C(17)H(17)NO(4), is a condensation product of 2-acetyl-pyridine and 2,4,6-trimeth-oxy-benzaldehyde. The mol-ecule is roughly planar, the dihedral angle between the pyridine and benzene rings being 5.51?(10)°. All the three meth-oxy groups are almost co-planar with the bound benzene ring [r.m.s. deviation of 0.0306?(2)?Å]. A weak C-H?O intra-molecular inter-action involving one of the ortho-meth-oxy groups generates an S(6) ring motif. In the crystal, the mol-ecules are linked by weak C-H?O inter-actions into anti-parallel face-to-face pairs. Adjacent pairs are further connected into sheets parallel to the ab plane.

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(E)-1-(2-Fur-yl)-3-(2,4,6-trimeth-oxy-phen-yl)prop-2-en-1-one.

Project description:In the title heteroaryl chalcone derivative, C(16)H(16)O(5), the dihedral angle between the furan and benzene rings is 14.45 (6)°. The three meth-oxy groups are almost coplanar with their attached benzene ring [C-C-O-C torsion angles = 2.07 (17), -5.04 (17) and 2.85 (16)°]. An intra-molecular C-H⋯O hydrogen bond occurs. In the crystal, adjacent mol-ecules are linked into X-shaped chains along the c axis by weak C-H⋯O(enone) inter-actions. These chains are stacked along the b axis. C⋯O [3.3308 (13)-3.4123 (14) Å] short contacts are also observed.

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