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.
Convert the Fischer projection to a perspective formula.
To convert the Fischer projection into perspective formula, firstly R and S confirmation is assigned to all the stereocentres present in the molecule on the basis of CIP rules and then the molecule is converted into perspective formula based on that confirmation.
The priority to the substituents attached to stereogenic centers is given by following these rules:
Higher priority is given to the atom with higher atomic number.
When the atoms have same atomic number, then the atomic number of the next atom bonded is considered.
Substituent with highest priority is numbered as 1 and with lowest priority is numbered as 4.
In Fischer projection, the R,S configuration can be assigned as given below.
On moving from higher priority to lower priority substituent in clockwise direction and 4th priority group should be in vertical position, then the compound is assigned with R configuration. If the 4th priority group is in horizontal position, then the compound is assigned with S configuration.
On moving from higher priority to lower priority substituent in anti-clockwise direction and 4th priority group should be in vertical position, then the compound is assigned with S configuration. If the 4th priority group is in horizontal position, then the compound is assigned with R configuration.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
