I. Manolov, M. Ströbele, H. Meyer
2008
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Journal
Analytical Sciences: X-ray Structure Analysis Online
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 Mr = 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.