5 research outputs found
3,5,7-Trimethoxy-2-(4-methoxyphenyl)-4H-1-benzopyran-4-one
Get PDFIn the title compound, C19H18O6, also known as 3,4′,5,7-tetramethoxyflavone, the dihedral angle between the benzopyran-4-one group and the attached benzene ring is 11.23 (8)°. An intramolecular C—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, molecules are linked into a two-dimensional network parallel to (01) by intermolecular C—H⋯O hydrogen bonds, which generate R
4
4(20), R
4
4(12) and R
2
2(14) ring motifs. Adjacent networks interact by π–π interactions between the pyran ring and its methoxyphenyl substituent [centroid–centroid distance = 3.5267 (8) Å]
5,7-Dimethoxy-2-(4-methoxyphenyl)-4H-1-benzopyran-4-one methanol solvate monohydrate
Get PDFIn the title compound (alternatively called 4′,5,7-trimethoxyflavone methanol solvate hydrate), C18H16O5·CH3OH·H2O, the flavone molecule is almost planar, the interplanar angle between the planes of the benzopyran-4-one group and the attached benzene ring being 4.69 (9)°. In the crystal, the flavone molecule makes intermolecular C—H⋯O hydrogen bonds to adjacent inversion-related flavone molecules, generating R
2
2(8) and R
2
2(14) rings and an infinite ribbon. The inversion-related ribbons are stabilized through the interstitial water and methanol molecules via intermolecular O—H⋯O hydrogen bonds, generating R
4
2(8) and R
2
1(6) rings and C
2
2(4) chains, and are further sustained by π–π interactions with an interplanar spacing of 3.365 (2)Å
