Which of the following does not exhibit mutar | vedclass

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(A) Mutarotation is the change in the optical rotation of a solution of a sugar due to the equilibrium between its $\alpha$ and $\beta$ anomeric forms

Vedclass · Accepted Answer

Sucrose

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(A) Mutarotation is the change in the optical rotation of a solution of a sugar due to the equilibrium between its $\alpha$ and $\beta$ anomeric forms. This phenomenon is observed in reducing sugars that possess a free hemiacetal or hemiketal group. Sucrose is a non-reducing disaccharide composed of $\alpha$-$D$-glucose and $\beta$-$D$-fructose linked by a glycosidic bond between $C1$ of glucose and $C2$ of fructose. Since both anomeric carbons are involved in the glycosidic linkage,sucrose does not have a free hemiacetal or hemiketal group and therefore does not exhibit mutarotation. Both $D$-glucose and $L$-glucose are monosaccharides with free anomeric carbons,so they exhibit mutarotation.

Which of the following does not exhibit mutarotation?

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