Crystal structure of (±)-(7RS,8SR)-7-methyl-1,4-dioxa-spiro-[4.5]decane-7,8-diol.
2015
In the title compound, C9H16O4, the five-membered dioxolane ring adopts a twist conformation; two adjacent C atoms deviate alternately from the mean plane of other atoms by −0.297 (4) and 0.288 (4) A. The spiro-fused cyclohexane ring shows a chair form. The hydroxy group substituted in an axial position makes an intramolecular O—H⋯O hydrogen bond with one of the O atoms in the cyclic ether, forming an S(6) ring motif. In the crystal, the O—H⋯O hydrogen bond involving the equatorial hydroxy group connects the molecules into a zigzag chain with a C(5) motif running along the c axis.
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