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4a-Hydroxy-9-(2-methoxyphenyl)-4,4a,5,6,7,8,9,9a-octahydro-3H-xanthene-1,8(2H)-dione
Loh W.-S, Fun H.-K, Reddy B.P, ,
Published in International Union of Crystallography (IUCr)
2011
Volume: 67
   
Issue: 1
Pages: o35 - o36
Abstract
In the title compound, C20H22O5, an S(6) ring motif is formed by an intramolecular C-H ⋯ O hydrogen bond, which contributes to the stabilization of the molecule. In the xanthene system, the cyclohexane ring adopts a chair conformation, the cyclohexene ring adopts a half-boat conformation and the tetrahydropyran ring adopts a halfchair conformation. The mean plane of the four essentially planar atoms of the tetrahydropyran ring [r.m.s deviation = 0.092 (1) Å] forms a dihedral angle of 64.13 (6)° with the mean plane of the methoxyphenyl group. In the crystal, intermolecular O-H ⋯ O and weak C-H ⋯ O hydrogen bonds link molecules into chains along the a axis, which are further stabilized by C-H ⋯π interactions.
About the journal
JournalActa Crystallographica Section E Structure Reports Online
PublisherInternational Union of Crystallography (IUCr)
ISSN16005368
Open AccessNo