Question

Write the product obtained when D glucose react with hydrogen cyanide

Answer 1

glucose cyanohydrin ..

Answer 2

Reaction of D-glucose with hydrogen cyanide leads to the formation of a compound called Glucose cyanohydrin.

Given:

• The reactants involved in the reaction are:

1. D-glucose
2. Hydrogen cyanide (HCN)

To find:

• D-glucose + HCN = ?

Mechanism involved:

• The mechanism which is involved in the reaction between D-glucose and HCN is Kiliani-Fischer synthesis of sugar.

Explanation:

• D-glucose is composed of aldehyde group at the top of the structure.
• When it is treated with HCN, it attacks the aldehyde group in two ways.
• First, the $H^+$ present in HCN will attack the $O^-$ present in the aldehyde group and forms OH.
• Secondly, the $CN^-$ attaches itself to Carbon atom present in the aldehyde group.
• Thus this yields a new compound called Glucose cyanohydrin. The chemical equation involved in the reaction is given in the attachment.

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