10a-Hydroxy-9-(4-methoxyphenyl)-3,4,5,6,7,8a,9,10a-octahydro-1H-xanthene-1,8(2H)-dione

In the title compound, C20H22O5, the tetrahydropyran, cyclohexene and cyclohexane rings of the xanthene ring system adopt half-chair, half-boat and chair conformations, respectively. The mean plane of the four roughly planar atoms of the tetrahydropyran ring (r.m.s. deviation = 0.111 Å) forms a dihedral angle of 82.91 (4)° with the methoxybenzene group. In the crystal, molecules are linked via O—H...O and C—H...O hydrogen bonds into sheets lying parallel to the ac plane. The crystal is further consolidated by weak C—H...π interactions.

Abstract licence: CC BY

1. 7.

   Structure validation in chemical crystallography · 2009

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