کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1389658 | 982908 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A 13C NMR study on the interactions of calcium chloride/potassium chloride with pyranosides in D2O A 13C NMR study on the interactions of calcium chloride/potassium chloride with pyranosides in D2O](/preview/png/1389658.png)
The 13C NMR spectra of methyl β-d-glucopyranoside, methyl β-d-galactopyranoside, methyl β-d-xylopyranoside, and methyl β-l-arabinopyranoside were recorded in CaCl2/KCl + D2O mixtures and in D2O. The chemical shifts of C-1, C-3, and C-5 in the methyl β-d-glucopyranoside and methyl β-d-galactopyranoside decrease rapidly as molalities of CaCl2/KCl increase, while those of C-1, C-2, and C-3 in the methyl β-d-xylopyranoside and methyl β-l-arabinopyranoside decrease rapidly as molalities of CaCl2/KCl increase. Cations (Ca2+/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.
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Journal: Carbohydrate Research - Volume 343, Issue 14, 22 September 2008, Pages 2428–2432