Á2NO 3 À , the diprotonated argininium molecule is linked by a strong OÐHÁ Á ÁO [2.653 (7) A Ê ] hydrogen bond to the nitrate anion. The singlebonded O atom of the carboxyl group exhibits a very unusual cis conformation with respect to the -amino N atom. Chelated three-centered hydrogen bonds are ob
l-Argininium(+) maleate(−) dihydrate
✍ Scribed by Sun, Zhi-Hua ;Yu, Wen-Tao ;Fan, Jian-Dong ;Xu, Dong ;Wang, Xin-Qiang
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 167 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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In the title compound, C~6~H~16~N~4~O~2~ ^+^·C~2~F~3~O~2~ ^−^, the amino acid exists as a zwitterionic argininium cation, with positively charged amino and guanidinium groups and a negatively charged carboxylate group. The trifluoroacetic acid molecule is deprotonated. The stoichiometry between the
Single-crystal X-ray study T = 293 K Mean '(C±C) = 0.005 A Ê Disorder in main residue R factor = 0.044 wR factor = 0.134 Data-to-parameter ratio = 9.8 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. ## Experimental An excess of
Single-crystal X-ray study T = 293 K Mean '(C±C) = 0.005 A Ê R factor = 0.044 wR factor = 0.132 Data-to-parameter ratio = 7.3 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The title compound, (C 6 H 15 N 4 O 2 ) 3 ÁCrF 6 Á3H 2 O, is isostructural with the vanadium analogue. One of the argininium cations is partially disordered over two different conformations. A complex network of N-HÁ Á ÁO, N-HÁ Á ÁF, O-HÁ Á ÁO and O-HÁ Á ÁF hydrogen bonds supports the structure.