Osajin

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Authors

LIŠKOVÁ M. MAREK Jaromír JANKOVSKÁ D. SUKUPOVÁ L. ŽEMLIČKA M. VANČO J.

Year of publication 2005
Type Article in Periodical
Magazine / Source Acta Crystallographica Section E: Structure Reports Online
MU Faculty or unit

Faculty of Science

Citation
Field Organic chemistry
Keywords crystal structure; flavonoids
Description Osajin [systematic name: 5-hydroxy-3-(3-hydroxyphenyl)-8,8-dimethyl-6-(3-methylbut-2-enyl)-4H,8H-pyrano[2,3-h]chromen-4-one, C25H24O5, crystallizes with two independent molecules in the asymmetric unit. The benzopyranone ring system is nearly planar in both molecules and they differ significantly only in the orientation of the benzene rings, which are rotated by 56.27 (7) and 44.16 (7)deg. with respect to the benzopyranone systems. In the crystal structure, intermolecular O-H...O hydrogen bonds link the molecules into dimers.
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