Reaction when D-glucose is treated with HCN
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When glucose is treated with HCN, a cyanohydrin is formed .
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Answer : The reaction is shown below.
Explanation :
As per question when D-glucose is treated with HCN then it gives D-gluconitrile and D-mannononitrile.
The role of addition of HCN :
The addition of cyanide to aldehyde group lengthens the chain by one carbon and generates a new stereocentre around which two configuration are possible. As a result, two diastereomeric cyanohydrins are formed.
The reaction is shown below.
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