sucrose

Question

Sucrose is a non-reducing sugar because:

RankGuru · Accepted Answer

A sugar is **reducing** if it possesses a free hemiacetal or hemiketal group (which is in equilibrium with a free aldehyde or ketone in aqueous solution).
- **Sucrose** is composed of $\alpha$-D-Glucose and $\beta$-D-Fructose.
- The glycosidic linkage occurs between $C_1$ of glucose (the aldehyde carbon) and $C_2$ of fructose (the ketone carbon).
- Since both **anomeric carbons** are involved in the bond, there is no free carbonyl group available to reduce Tollen's or Fehling's reagents.

Rank Guru

sucrose

Select the correct option: