Aldehydes and ketones give pure addition reac | vedclass

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Question

(D) Carbonyl compounds $(>C=O)$ react with $HCN$ to form cyanohydrins via a nucleophilic addition reaction,which is a pure addition reaction.Reaction:

Vedclass · Accepted Answer

Hydrogen cyanide

Vedclass · Answer

(D) Carbonyl compounds $(>C=O)$ react with $HCN$ to form cyanohydrins via a nucleophilic addition reaction,which is a pure addition reaction.Reaction: $>C=O + HCN \rightarrow >C(OH)(CN)$.Conversely,reactions with hydrazine $(NH_2NH_2)$,phenyl hydrazine $(NH_2NHC_6H_5)$,and semicarbazide $(NH_2NHCONH_2)$ are addition-elimination reactions (nucleophilic addition followed by the elimination of a water molecule) to form derivatives like hydrazones,phenylhydrazones,and semicarbazones,respectively.Therefore,$HCN$ is the correct choice for a pure addition reaction.

Aldehydes and ketones give pure addition reaction with:

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