4.2 Consider the following Haworth projection of monosaccharide A: OH OH OH OH ÓH monosaccharide A (a) Draw a Fischer projection of monosaccharide A using the template (a) below. Clearly indicate if the structure is the D-or L-configuration of monosaccharide A. (b) Use the template (b) below and provide the enantiomer of the Fischer projection of (a). Clearly indicate if the enantiomer is the D-or L-configuration. (c) Draw a three-dimensional line structure of the Fischer projection (a) using the template (c) below.
Carbohydrates
Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.
Starch
Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.
Mutarotation
The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of the α- and β- glucose anomers upon its dissolution in the solvent water. This process is usually seen in the chemistry of carbohydrates.
L Sugar
A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotating the polarized light’s plane in the direction anticlockwise. L isomers are one of the 2 isomers formed by the configurational stereochemistry of the carbohydrates.
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