NMR Study Conformations of Calcium Gluconate in the Aqueous Solution
- Authors: Akhmetov M.M.1, Konygin G.N.2, Rybin D.S.2, Petukhov V.Y.1, Gumarov G.G.1, Konov A.B.1
-
Affiliations:
- Zavoisky Physical-Technical Institute, Russian Academy of Sciences
- Physical-Technical Institute
- Issue: Vol 48, No 10 (2017)
- Pages: 971-979
- Section: Original Paper
- URL: https://journals.rcsi.science/0937-9347/article/view/247853
- DOI: https://doi.org/10.1007/s00723-017-0918-5
- ID: 247853
Cite item
Abstract
Different spatial structures that arise due to rotation around simple bonds without violating the integrity of the molecule (without breaking chemical bonds) are called conformations. 1H nuclear magnetic resonance (NMR) study of the spatial structure of calcium gluconate in the aqueous solution has been carried out. It was shown that molecules of calcium gluconate exist in the form of two conformations: zigzag 1-P and cyclic 3G+. The results of homonuclear 2D 1H NMR spectroscopy indicate the predominantly zigzag conformation. It was found that the intermolecular hydrogen bonds are formed and the spatial structure of molecules changes at the increase in the solution concentration. The observed concentration behavior of the conformation of calcium gluconate is also associated with the presence of the intramolecular hydrogen bonds –O(C4)H··O(C2).
About the authors
M. M. Akhmetov
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Author for correspondence.
Email: mansik86@mail.ru
Russian Federation, Kazan
G. N. Konygin
Physical-Technical Institute
Email: mansik86@mail.ru
Russian Federation, Ural Branch, Izhevsk
D. S. Rybin
Physical-Technical Institute
Email: mansik86@mail.ru
Russian Federation, Ural Branch, Izhevsk
V. Yu. Petukhov
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Email: mansik86@mail.ru
Russian Federation, Kazan
G. G. Gumarov
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Email: mansik86@mail.ru
Russian Federation, Kazan
A. B. Konov
Zavoisky Physical-Technical Institute, Russian Academy of Sciences
Email: mansik86@mail.ru
Russian Federation, Kazan