Fructose structure: Learn about fructose's structure

Learn about fructose's structure, formula, key properties, and how it differs from glucose and sucrose. Clear diagrams and exam-ready notes. The structure of fructose is cyclic or chair-like. There are a few deviations to the general structure of fructose, but its overall form is largely identical to that of glucose. The structure of fructose, like all simple sugars, can be expressed as a six-carbon linear chain with hydroxyl and carbonyl groups. In its crystalline form and in solution, however, most of it exists as two hemiketal rings: β- D -fructopyranose 1 (left) and β- D -fructofuranose 1 (right). Glucose and Fructose are Which Isomers Glucose and fructose are functional isomers of each other because they have same molecular formula that is C 6 H 12 O 6 But different functional group in their chemical formula. Glucose has aldehyde group while fructose has ketone as functional group. They differ in the nature of the functional group. Glucose is an aldehyde and fructose is a ketone.