Q. 13.38 - An Introduction to General, Organic, and Biological Chemistry

Question

Draw the Fischer projection for the oxidation and the reduction products of D-mannose. What are the names of the sugar acid and the sugar alcohol produced?

Step-by-Step Solution

Answer

The oxidation and reduction products of D-mannose are

Step 1: Given Information

The equation is 

Step 2: Determine the three-dimensional structures

Carbohydrates are organic compounds that are the most numerous on the planet. Carbohydrates account for approximately $75\%$ of the dry planet's bulk. Fischer devised a streamlined approach for sketching atom configurations around chiral carbons. Vertical lines in this three-dimensional structure indicate bonds that project backward from a carbon atom, while horizontal lines represent bonds that project forward.

Step 3: Determine the oxidation and reduction reactions

In oxidation reaction of monosaccharides the aldehyde group with adjacent hydroxyl is oxidized to carboxylic acid by an oxidizing agent. One of the oxidizing agents used for oxidation of monosaccharides is Benedict's reagent.

In reduction reaction of monosaccharides the carbonyl group present in monosaccharides produces sugar alcohols. These sugar alcohols also known as aldito/s.

Step 4: Determine the oxidation and reduction products

oxidation product

reduction product