How many alcohol groups are present in Fructofuranose structure?

Question

How many alcohol groups are present in Fructofuranose structure? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

In fructose, the OH group at C-5 can attack the C=O. group at C-2 and form a cyclic hemiketal. The product is called fructofuranose in analogy with the five-membered ring of furan. The structure of α-D-(-)- Fructofuranose is: <img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/c-yydrlhf4m8mengyb.jpg" /> It has 5-OH groups.

Q. How many alcohol groups are present in Fructofuranose structure?

In fructose, the $O H$ group at $C - 5$ can attack the $C = O$ . group at $C - 2$ and form a cyclic hemiketal. The product is called fructofuranose in analogy with the five-membered ring of furan.
The structure of $α - D - (-) -$ Fructofuranose is:

It has $5 - O H$ groups.

Q. How many alcohol groups are present in Fructofuranose structure?

In fructose, the OH group at C−5 can attack the C=O. group at C−2 and form a cyclic hemiketal. The product is called fructofuranose in analogy with the five-membered ring of furan. The structure of α−D−(−)− Fructofuranose is: It has 5−OH groups.

In fructose, the $O H$ group at $C - 5$ can attack the $C = O$ . group at $C - 2$ and form a cyclic hemiketal. The product is called fructofuranose in analogy with the five-membered ring of furan.
The structure of $α - D - (-) -$ Fructofuranose is:

It has $5 - O H$ groups.