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Carbohydrates: classification, glucose structure, reactions
JEE Main level
Single correct option
Difficulty 2 of 3
bm017
Reduction of D-fructose with
NaBH
X
4
gives
A
D-glucitol (sorbitol) only
B
D-mannitol only
C
a mixture of D-glucitol and D-mannitol
D
gluconic acid
Answer: C
Reduction of the C-2 ketone creates a new stereocentre with either configuration. The two products are the C-2 epimers D-glucitol and D-mannitol.
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