13C NMR measurements of acid-base equilibrium constants in alkaline aqueous solutions of D-glucose anomers

被引：0
|
作者：
K. I. Popov
N. M. Sultanova
H. Rönkkömäki
机构：
[1] Moscow State University of Food Production,
[2] Regional Institute of Professional Diseases,undefined
来源：
Russian Journal of Physical Chemistry | 2006年 / 80卷
关键词：
Dissociation Constant; Alkali Content; Alkaline Aqueous Solution; Experimental Chemical Shift; Base Equilibrium Constant;
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摘要：
The concentration dissociation constants pKc of the α and β D-glucose anomers were measured at pH 12–14 by the 13C NMR method. The pKc values for L ⇔ H−1L + H equilibria at 25°C and an ionic strength of 1.0 mol/l (NaCl) were pKcα = 12.31 ± 0.03 and pKcβ = 12.03 ± 0.01. Dissociation was found to shift all the spectrum lines downfield. The most probable hydroxyl group responsible for the dissociation of β-D-glucose was determined.
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页码：1680 / 1682
页数：2
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