5,3′,4′-Trihydroxy-7-methoxyflavanone was isolated from Artemisia sphaeroce- phala Kraschen and characterized by 1H-NMR, 13C-NMR, EI-MS, IR, UV spectra, and single- crystal X-ray diffraction. The title compound crys...5,3′,4′-Trihydroxy-7-methoxyflavanone was isolated from Artemisia sphaeroce- phala Kraschen and characterized by 1H-NMR, 13C-NMR, EI-MS, IR, UV spectra, and single- crystal X-ray diffraction. The title compound crystallizes in orhtorhombic space group Pca21, with a = 14.393（3）, b = 5.1629（12）, c = 36.919（9）, V = 2743.4（11）3, Z = 8, Mr = 302.27, Dc = 1.464 g/cm3, F（000） = 1264, μ = 0.113 mm-1, S = 1.015,（Δ/σ）max = 0.000, the final R = 0.0757 and wR = 0.1809. Structural analysis indicates the title compound consists of two 5,3′,4′-trihydroxy- 7-methoxyflavanone enantiomers in a well-defined arrangement within the crystal lattice, which constructs a three-dimensional network by means of multiple O–H…O hydrogen bonds.展开更多
基金supported by the Science and Technology Agency of Henan Province(112102310305)the International Cooperation Program of Henan Province(No.092102310282)
文摘5,3′,4′-Trihydroxy-7-methoxyflavanone was isolated from Artemisia sphaeroce- phala Kraschen and characterized by 1H-NMR, 13C-NMR, EI-MS, IR, UV spectra, and single- crystal X-ray diffraction. The title compound crystallizes in orhtorhombic space group Pca21, with a = 14.393（3）, b = 5.1629（12）, c = 36.919（9）, V = 2743.4（11）3, Z = 8, Mr = 302.27, Dc = 1.464 g/cm3, F（000） = 1264, μ = 0.113 mm-1, S = 1.015,（Δ/σ）max = 0.000, the final R = 0.0757 and wR = 0.1809. Structural analysis indicates the title compound consists of two 5,3′,4′-trihydroxy- 7-methoxyflavanone enantiomers in a well-defined arrangement within the crystal lattice, which constructs a three-dimensional network by means of multiple O–H…O hydrogen bonds.
