A (13)C NMR study on the interactions of calcium chloride/potassium chloride with pyranosides in D(2)O.
The (13)C NMR spectra of methyl beta-d-glucopyranoside, methyl beta-d-galactopyranoside, methyl beta-d-xylopyranoside, and methyl beta-l-arabinopyranoside were recorded in CaCl(2)/KCl+D(2)O mixtures and in D(2)O. The chemical shifts of C-1, C-3, and C-5 in the methyl beta-d-glucopyranoside and methyl beta-d-galactopyranoside decrease rapidly as molalities of CaCl(2)/KCl increase, while those of C-1, C-2, and C-3 in the methyl beta-d-xylopyranoside and methyl beta-l-arabinopyranoside decrease rapidly as molalities of CaCl(2)/KCl increase. Cations (Ca(2+)/K(+)) can weakly complex with O in OMe of the pyranosides studied. Results are discussed in terms of the stereochemistry of the pyranoside molecules and the structural properties of the ions.
Zhuo
Kelei
K
School of Chemistry and Environmental Science, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China. klzhuo@263.net
Liu
Hongxun
H
Zhang
Xinkuan
X
Liu
Yaohui
Y
Wang
Jianji
J
D000838:Anions / Q000737:chemistry; D002118:Calcium / Q000737:chemistry; D002122:Calcium Chloride / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry; D002247:Carbon Isotopes / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D002712:Chlorides / Q000737:chemistry; D017666:Deuterium Oxide / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011188:Potassium / Q000737:chemistry; D011189:Potassium Chloride / Q000737:chemistry*; D011714:Pyrans / Q000737:chemistry*
D000838:Anions; D002247:Carbon Isotopes; D002412:Cations; D002712:Chlorides; D006027:Glycosides; D011714:Pyrans; D011189:Potassium Chloride; D002244:Carbon; D017666:Deuterium Oxide; D002122:Calcium Chloride; D011188:Potassium; D002118:Calcium