Acta Cryst. (2004). E60, o81-o83  [ doi:10.1107/S1600536803027806 ]

A second polymorph of (+)-pinoresinol-dioxane (1/1)

R. Stomberg, V. Langer and K. Lundquist

Abstract: The crystal structure of the title compound, C₂₀H₂₂O₆·C₄H₈O₂, has been determined. The crystals are stabilized by O-HO hydrogen bonding between the pinoresinol and dioxane molecules. C-HO hydrogen bonds are absent, but are present in a previously reported polymorph of the solvate. The formation of two polymorphs may be related to different hydrogen-bonding possibilities. The five-membered rings in the central dioxabicyclooctane ring system of the pinoresinol molecules in the title compound are twisted on the benzylic C and the O atom.

Online 12 December 2003

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