Acta Cryst. (2009). E65, o1279  [ doi:10.1107/S1600536809017292 ]

2,2'-Dimethoxy-4,4'-[rel-(2R,3S)-2,3-dimethylbutane-1,4-diyl]diphenol

C. L. Salinas-Salazar, M. del R. Camacho-Corona, S. Bernès and N. Waksman de Torres

Abstract: The title molecule, C₂₀H₂₆O₄, commonly known as meso-dihydroguaiaretic acid, is a naturally occurring lignan extracted from Larrea tridentata and other plants. The molecule has a noncrystallographic inversion center situated at the midpoint of the central C-C bond, generating the meso stereoisomer. The central C-C-C-C alkyl chain displays an all-trans conformation, allowing an almost parallel arrangement of the benzene rings, which make a dihedral angle of 5.0 (3)°. Both hydroxy groups form weak O-HO-H chains of hydrogen bonds along [100]. The resulting supramolecular structure is an undulating plane parallel to (010).

Online 14 May 2009

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