𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Nuclear overhauser effects and the flexibility of saccharides: methyl β-xylobioside

✍ Scribed by Miloš Hricovíni; Igor Tvaroška; Ján Hirsch; Anthony J. Duben

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
480 KB
Volume
210
Category
Article
ISSN
0008-6215

No coin nor oath required. For personal study only.

✦ Synopsis

The behavior of methyl beta-xylobioside has been analysed by 1H-n.m.r. spectroscopy for solutions in water and methanol in the range - 15 degrees to 85 degrees. Experimental n.O.e. values did not change with temperature and solvent in contrast to the inter-glycosidic 3JC,H values. Experimental n.O.e. data accorded with the values calculated from time-averaged cross-relaxation terms. The tumbling times were determined from relaxation data and were in the sub-ns range.

📜 SIMILAR VOLUMES

The conformational analysis of methyl β-
The conformational analysis of methyl β-xylobioside: effect of choice of potential functions
✍ Anthony J. Duben; Miloš Hricovini; Igor Tvaroška 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 888 KB

In order to determine the effect of the choice of potential function used in the conformational analysis of a carbohydrate, the NMR spectrum of methyl beta-xylobioside [beta-D-Xyl-(1-->4)-beta-D-Xyl-(1-->O)-Me] was interpreted using calculated J13C-H coupling constants and nuclear Overhauser effects

Nuclear overhauser effects and conformat
Nuclear overhauser effects and conformations of branched trisaccharide methyl β-glycosides that contain a 3,4-disubstituted galactose residue
✍ Grigory M. Lipkind; Alexander S. Shashkov; Oleg A. Nechaev; Vladimir I. Torgov; 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 988 KB

N.O.e. data after pre-irradiation of the anomeric protons and the 3JC,H values associated with the glycosidic linkages for a series of methyl beta-glycosides of trisaccharides that contain 3,4-disubstituted galactose residues have been measured. On the basis of the experimental results and theoretic

Nuclear overhauser effects and conformat
Nuclear overhauser effects and conformations of branched trisaccharide methyl β-glycosides that contain a 2,3-disubstituted galactose residue
✍ Grigory M. Lipkind; Alexander S. Shashkov; Oleg A. Nechaev; Vladimir I. Torgov; 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 664 KB

On the basis of the n.O.e. data and theoretical calculations, it was found that less than 90% of one conformer was present in aqueous solution for each of a series of trisaccharide methyl beta-glycosides with a 2,3-disubstituted galactose residue.

The nuclear overhauser effect and struct
The nuclear overhauser effect and structural factors determining the conformations of disaccharide glycosides
✍ Grigory M. Lipkind; Alexander S. Shashkov; Suren S. Mamyan; Nikolay K. Kochetkov 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 786 KB

## Conformations of (l-2)-, (l&+3)-, and (l-4)linked disaccharide methyl glycosides involving aldohexopyranose residues have been studied on the basis of the inter-unit n.0.e. and theoretical calculations using atom-atom potential functions. The preferred conformations and the n.0.e. values are de

Analysis of Spin Diffusion and Cross Cor
Analysis of Spin Diffusion and Cross Correlation on the Net Nuclear Overhauser Effect in NMR
✍ P.K. Madhu; Anil Kumar 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 113 KB

The effect of dipole-dipole cross correlations on the net nuclear Overhauser effect (NOE) has been analyzed here for realistic systems by extending the three-spin calculations to four and five spins in order to account for additional cross correlations and spin diffusion. These have been compared wi