The crystal structure of the title compound, C 9 H 10 O 4 , contains in®nite hydrogen-bonded chains of molecules. The norbornene skeleton is slightly twisted.
2-Norbornene-exo-cis-5,6-dicarboxylic acid
✍ Scribed by Batsanov, Andrei S. ;Hesselink, Joanna L.
- Publisher
- International Union of Crystallography
- Year
- 2002
- Tongue
- English
- Weight
- 334 KB
- Volume
- 58
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
Single-crystal X-ray study T = 150 K Mean '(C±C) = 0.003 A Ê Disorder in main residue R factor = 0.049 wR factor = 0.102 Data-to-parameter ratio = 12.1 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
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In the title complex, 2C 9 H 10 O 4 ÁC 8 H 12 N 2 , there is an inversion centre at the centre of the 2,3,5,6-tetramethylpyrazine molecule, which is linked to two endo-norbornene-cis-5,6-dicarboxylic acid molecules via O-HÁ Á ÁN hydrogen bonds. In the crystal structure, O-HÁ Á ÁO and O-HÁ Á ÁN hydro
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