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NMR conformational analysis of complexes of the carboxylic ionophore nigericin with Na+ and K+

✍ Scribed by Jean-Claude Beloeil; Valérie Biou; Gérard Dauphin; Jean Garnier; Nelly Morellet; Françoise Vaufrey

Book ID
102527789
Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
294 KB
Volume
32
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The conformations of the complexes formed by the ionophore nigericin with Na^+^ and K^+^ in CDCl~3~ solution determined by ROESY NMR and distance geometry computations are in good agreement with the X‐ray crystallographic data. The structures with the Na^+^ ion are more compact than those with the K^+^ ion, as the latter have a wider cage for the ion.

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✍ Hitoshi Kuboniwa; Kazuo Yamaguchi; Akira Hirao; Seiichi Nakahama; Noboru Yamazak 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 428 KB

The ' H NMR spectra of the potassium salt of a synthetic polyether carboxylic ionophore, HO[CH,CH,0(1,2-C&)O],CH,(1,2-C6&)COOH (l), in CDCI, were assigned by two-dimensional NMR methods (2D chemical shift correlation and 2D NOE). The gauche conformer about the C-C bond of the 1,2-dioxyethylene group