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Q.
The formation of cyanohydrin from acetone is which type of reaction?
NTA AbhyasNTA Abhyas 2020Aldehydes Ketones and Carboxylic Acids
Solution:
Cyanohydrin formation:
This reaction is nucleophilic addition reaction.
Step (i): The nucleophilic carbon in the cyanide adds to the electrophilic carbon in the polar carbonyl group, electrons from the $\text{C} \, \text{=} \, \text{O}$ move to the electronegative $\text{O}$ creating an intermediate alkoxide.
Step (ii): An $a c i d / b a s e$ reaction protonation of the alkoxide oxygen creates the cyanohydrin product.