Monosaccharides conformational formulas

The Haworth representation implies a planar ring. However, monosaccharides assume conformations that are not planar these may be represented by Haworth conformational formulae. The nomenclature of conformations is described in 2-Carb-7. For example, (5-D-glucopyranose assumes a chair conformation ... 

Disaccharides are named by adding the name of a glycosyl group as a prefix to that of the monosaccharide chosen as parent, as exemplified by a-lactose (a Haworth perspective formula and a conformational formula are shown). 

CONFORMATIONAL STRUCTURES Although Haworth projection formulas are often used to represent carbohydrate structure, they are oversimplifications. Bond angle analysis and X-ray analysis demonstrate that conformational formulas are more accurate representations of monosaccharide structure (Figure 7.10). Conformational structures are more accurate because they illustrate the puckered nature of sugar rings. 

A series of physicochemical properties of monosaccharides can be explained only by the conformation formulas Reeves formulas). 

Mono-/ di-/ tri-l oligo-/ polysaccharide A molecule consisting of one/ two/ three/ several/ many saccharide units. Monosaccharides are the simplest sugars, and conform to the chemical formula (CH20) . 

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