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From the below list, identify the sugars which on reduction give the same glucitol:
- a)D-glucose: D-allose
- b)D-glucose: D-gulose
- c)D-glucose: D-galactose
- d)D-glucose: D-mannose
Correct answer is option 'B'. Can you explain this answer?
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From the below list, identify the sugars which on reduction give the s...
Explanation:
When a sugar is reduced with a reducing agent such as sodium borohydride, it can form a sugar alcohol or polyol known as a glucitol. The formation of glucitol depends on the stereochemistry of the reducing sugar.
Reducing Sugars:
Reducing sugars are those sugars that have a free aldehyde or ketone group that can be oxidized to form a carboxylic acid. The reducing sugars in the given options are:
a)D-glucose: D-allose
b)D-glucose: D-gulose
c)D-glucose: D-galactose
d)D-glucose: D-mannose
Glucitol:
Glucitol is a sugar alcohol derived from glucose. It is also known as sorbitol. The chemical formula of glucitol is C6H14O6.
Answer:
The correct answer is option B, i.e., D-glucose and D-gulose.
Both D-glucose and D-gulose are epimers of each other, differing only in the stereochemistry at the C-2 carbon. When reduced with a reducing agent, both D-glucose and D-gulose form the same glucitol, i.e., D-sorbitol. This is because the stereochemistry at the C-2 carbon does not affect the formation of the glucitol.
On the other hand, D-allose, D-galactose, and D-mannose are not epimers of D-glucose and D-gulose at the C-2 carbon. Therefore, they will not form the same glucitol upon reduction.
When a sugar is reduced with a reducing agent such as sodium borohydride, it can form a sugar alcohol or polyol known as a glucitol. The formation of glucitol depends on the stereochemistry of the reducing sugar.
Reducing Sugars:
Reducing sugars are those sugars that have a free aldehyde or ketone group that can be oxidized to form a carboxylic acid. The reducing sugars in the given options are:
a)D-glucose: D-allose
b)D-glucose: D-gulose
c)D-glucose: D-galactose
d)D-glucose: D-mannose
Glucitol:
Glucitol is a sugar alcohol derived from glucose. It is also known as sorbitol. The chemical formula of glucitol is C6H14O6.
Answer:
The correct answer is option B, i.e., D-glucose and D-gulose.
Both D-glucose and D-gulose are epimers of each other, differing only in the stereochemistry at the C-2 carbon. When reduced with a reducing agent, both D-glucose and D-gulose form the same glucitol, i.e., D-sorbitol. This is because the stereochemistry at the C-2 carbon does not affect the formation of the glucitol.
On the other hand, D-allose, D-galactose, and D-mannose are not epimers of D-glucose and D-gulose at the C-2 carbon. Therefore, they will not form the same glucitol upon reduction.
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From the below list, identify the sugars which on reduction give the s...
Both have same structure. For glucose see from upside and for gulose see from down side
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From the below list, identify the sugars which on reduction give the same glucitol:a)D-glucose: D-alloseb)D-glucose: D-gulosec)D-glucose: D-galactosed)D-glucose: D-mannoseCorrect answer is option 'B'. Can you explain this answer?
Question Description
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