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6,6′-Dioxo-2,2-bi(7-oxatri­cyclo­[3.2.1.13,8]­nonane)-4,4′-di­carboxyl­ic acid

✍ Scribed by Hu, Mao-Lin ;Cheng, Ya-Qian ;Wang, Shun ;Yuan, Ji-Xin ;Cai, Xiao-Qing


Publisher
International Union of Crystallography
Year
2005
Tongue
English
Weight
331 KB
Volume
61
Category
Article
ISSN
1600-5368

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✦ Synopsis


6,6 0 0 0 -Dioxo-2,2-bi(7-oxatricyclo[3.2.1.1 3,8 ]nonane)-4,4 0 0 0 -dicarboxylic acid


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Tetra­hydro-2,6,6-tri­methyl-1,4-pyran-2
✍ Barnes, John C. ;Weakley, Timothy J. R. 📂 Article 📅 2003 🏛 International Union of Crystallography 🌐 English ⚖ 208 KB

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 ), respective