Question

Fructose and its structure.

Answer 1

It is a ketohexose and is obtained by hydrolysis of sucrose. Its molecular formula is found to be C₆H₁₂O₆. 

Its open chain structure is established as :

Naturally occurring fructose is levorotatory and belongs to D–family. Fructose also exits in two cyclic forms like glucose via five membered furanose ring with an analogy to furan ring ;