Crystal Structure of 4-Hydroxy-3-[(2-oxo-2H-chromen-3-yl)-(3,4,5-trimethoxyphenyl)methyl]chromen-2-one

Abstract

The title compound, 4-hydroxy-3-[(2-oxo-2H-chromen-3-yl)-(3,4,5-trimethoxyphenyl)methyl]chromen-2-one, C₂₈H₂₂NO₉, as a dimer C₅₆H₄₄O₁₈ M_r = 1004.91, crystallizes in the monoclinic system, space group C2/c with cell constants: a = 3599.8(4)pm, b = 900.7(1)pm, c = 1460.7(2)pm, β = 98.02(1)°, V = 4.690(1)nm³, Z = 4. The 4-hydroxycoumarins are intra-molecularly hydrogen bonded between hydroxyls and carbonyls.