Cellobiose, molecular model

You can view molecular models of maltose and cellobiose on Learning By Modeling. 

FIGURE 25.6 Molecular models of the disaccharides maltose and cellobiose. Two D-glucopyranose units are connected by a glycoside linkage between C-1 and C-4. The glycosidic bond has the a orientation in maltose and is p in cellobiose. Maltose and cellobiose are diastereomers. 

Inspection of molecular models shows that the two water molecules of each dibenzene sandwich may be replaced by a cellobiose entity representing a unit of the cellulose fibre. This possibility provides a good explanation of the strong fixation of this dye on cotton fabric [140]. 

A novel method for the determination of the 3D structure of oligosaccharides in the solid state using experimental C NMR data was presented. A novel approach employed this information, combined with C chemical shift surfaces for the glycosidic bond carbons in the generation of NMR pseudopotential energy functions suitable for use as constraints in molecular modelling simulations. Application of the method to trehalose, cellobiose, and cellotetraose produces 3D models that agree remarkably well with the reported X-ray structures. The usefulness of the approach is further demonstrated in the determination of the 3D structure of the cellohexaose, an hexasaccharide for which no X-ray data has been reported. 

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