Unique Coordination Mode of Potassium Ions to Glycyrrhizin: X-ray Crystal Structure of Glycyrrhizin Dipotassium Salt

The coordination of six potassium ions to glycyrrhizin (1) is shown in a crystal: two crystallographically independent (K1 and K2) and four symmetry-translated potassium ions coordinate to the oxygen atoms of the sugar-linkage moiety, and the K1 and K2 ions form seven and six coordination bonds with...

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Veröffentlicht in:Chemistry letters 2009-11, Vol.38 (11), p.1024-1025
Hauptverfasser: In, Yasuko, Uchida, Masaru, Watanabe, Masamichi, Aimi, Norio, Ishida, Toshimasa
Format: Artikel
Sprache:eng
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Zusammenfassung:The coordination of six potassium ions to glycyrrhizin (1) is shown in a crystal: two crystallographically independent (K1 and K2) and four symmetry-translated potassium ions coordinate to the oxygen atoms of the sugar-linkage moiety, and the K1 and K2 ions form seven and six coordination bonds with the neighboring oxygen atoms, respectively. Although three carboxyl groups of 1 are in an anionic state, two of the glycosides participate in the coordination bonds with the potassium ions.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.2009.1024