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This question is referring to a glucose ring structure How does ring closure affect structural variability?...

This question is referring to a glucose ring structure

How does ring closure affect structural variability? That is, can the ring form of glucose have as many different structural shapes as the chain form of glucose? Is this 6-member glucose ring actually flat (planar)? Why/why not? Where is the carbonyl group in the glucose ring? Can you convert the ring to the chain without breaking bonds? How many carboxyl groups are in this molecule? How many dissociable groups? Could you convert an alpha glucose molecule to a beta glucose molecule without breaking any bonds?

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Answer #1

The above is the chain structure of glucose

The above is the ring structure of glucose

If the carbonyl group is located at one end of the sugar, it is classified as an aldehyde group, and the sugar is an aldose sugar. If the carbonyl group is located on an internal C atom, it is classified as a keto group, and the sugar is a ketose sugar.

Since the linear and cyclic forms of glucose inter-convert with each other, alpha glucose can turn into beta glucose and vice versa. If you take a sample of pure alpha glucose and put it into water, you'll end up with a sample that is part alpha and part beta glucose.

The Interconvertable change in Alfa and beta forms IS  called Mutarotation

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