Journal ArticleDOI
Structure of 7-methoxy-2-(2-methoxyphenyl)-4h-1-benzopyran-4-one (2',7-dimethoxyflavone)
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TLDR
The benzopyran heterocycle is planar within experimental errors (max. deviation from the best mean plane through the ten atoms 0.031 angstrom) for 1848 observed reflections.Abstract:
C17H14O4, M(r) = 282.30, monoclinic, P2(1)/c, a = 12.498 (4), b = 9.490 (2), c = 12.184 (2) angstrom, beta = 107.87 (2)degrees, V = 1375.4 (6) angstrom 3, Z = 4, D(x) = 1.36 g cm-3, Cu K-alpha, lambda = 1.54178 angstrom, mu = 7.98 cm-1, F(000) = 592, T = 291 K, R = 0.042 for 1848 observed reflections. The benzopyran heterocycle is planar within experimental errors (max. deviation from the best mean plane through the ten atoms 0.031 angstrom). The dihedral angle between the heterocycle and the phenyl ring is 23.5 (5)degrees. The methoxy groups are nearly coplanar with their aromatic rings (torsion angles about C(arom)-O are 4-6-degrees).read more
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Use of π–π forces to steer the assembly of chromone derivatives into hydrogen bonded supramolecular layers: crystal structures and Hirshfeld surface analyses
TL;DR: In this article, a detailed analysis of the Hirshfeld surfaces and fingerprint plots has been performed to compare the intermolecular interactions in building different supramolecular architectures, showing that more than two-thirds of the close contacts are associated with weak interactions.
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Structural bases for the inhibition of aldose reductase by phenolic compounds.
TL;DR: In the search for aldose reductase inhibitors less acidic than carboxylic acids, phenolic compounds related to benzopyran-4-one and chalcone are particularly interesting because they possess good inhibitory properties.
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Structure of 2,9-dimethyl-1,10-phenanthroline hemihydrate
TL;DR: In this article, the authors describe a set of paires de molecules dimethylphenanthroline reliees par un axe binaire and liees par des hydrogenes a l'un des atomes N dans chaque molecule.
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Crystal and molecular structure of 2′,4′-dimethoxyflavone
TL;DR: In this article, the asymmetric unit is composed of two molecules, which are in planar conformations, differ in 4′methoxyl group orientation, and short intramolecular contacts are found between the γ-benzopyran portion and the dimethoxyphenyl ring.
Journal ArticleDOI
Structure of 7-Methoxy-2-(2-methoxyphenyl)-4H-1-benzopyran-4-one (2′,7- Dimethoxyflavone).
TL;DR: The benzopyran heterocycle is planar within experimental errors (max. deviation from the best mean plane through the ten atoms 0.031 angstrom) for 1848 observed reflections.