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2-Norbornene-exo,endo-5,6-di­carboxyl­ic acid

✍ Scribed by Batsanov, Andrei S. ;Hesselink, Joanna L.

Publisher
International Union of Crystallography
Year
2002
Tongue
English
Weight
167 KB
Volume
58
Category
Article
ISSN
1600-5368

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✦ Synopsis

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.

📜 SIMILAR VOLUMES

2-Norbornene-exo-cis-5,6-di­carboxyl­ic
2-Norbornene-exo-cis-5,6-di­carboxyl­ic acid
✍ Batsanov, Andrei S. ;Hesselink, Joanna L. 📂 Article 📅 2002 🏛 International Union of Crystallography 🌐 English ⚖ 334 KB

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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✍ Batsanov, Andrei S. ;Hesselink, Joanna L. 📂 Article 📅 2002 🏛 International Union of Crystallography 🌐 English ⚖ 172 KB

Both carboxyl groups in the title molecule, C 9 H 12 O 4 , have gauche orientations [relative to the (HOOCÐ)CÐC(Ð COOH) bond] and participate in hydrogen bonds, linking the molecules into an in®nite chain. ## Experimental Hydrogen was introduced to a stirred mixture of (II) (0.65 g, 4 mmol), pall

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✍ Batsanov, Andrei S. ;Hesselink, Joanna L. 📂 Article 📅 2002 🏛 International Union of Crystallography 🌐 English ⚖ 225 KB

The structure of the title compound, C 9 H 12 O 4 , contains two independent molecules in the asymmetric unit, with an unusually strong twist around the norbornane C2ÐC3 bond.