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Tetra­hydro-2,6,6-tri­methyl-1,4-pyran-2,5-di­carboxyl­ic acid (cineolic acid)

✍ Scribed by Barnes, John C. ;Weakley, Timothy J. R.

Publisher
International Union of Crystallography
Year
2003
Tongue
English
Weight
208 KB
Volume
59
Category
Article
ISSN
1600-5368

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✦ Synopsis

In the title compound, C 10 H 16 O 5 , the carboxylate group at the C-2 position is axial, but that at C-5 is equatorial. These carboxylate groups form hydrogen-bonded rings [average OÁ Á ÁO H distance = 2.64 (1) A Ê ] across the inversion centers at ( 1 2 , 0, 0) and ( 1 2 , 1 2 , 1 2 ), respectively, linking the molecules into stepped chains along the bc diagonal of the cell.

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