A and B in the following reaction are :- | vedclass

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(D) The reaction of a ketone $(R_2C=O)$ with $HCN$ in the presence of $KCN$ (as a catalyst) is a nucleophilic addition reaction that forms a cyanohydr

Vedclass · Accepted Answer

$A = R_2C(OH)CN, B = LiAlH_4$

Vedclass · Answer

(D) The reaction of a ketone $(R_2C=O)$ with $HCN$ in the presence of $KCN$ (as a catalyst) is a nucleophilic addition reaction that forms a cyanohydrin. Thus,$A$ is the cyanohydrin,which has the structure $R_2C(OH)CN$. Next,the reduction of the cyano group $(-CN)$ to a primary amine $(-CH_2NH_2)$ is achieved using a strong reducing agent like lithium aluminum hydride $(LiAlH_4)$. Therefore,$B$ is $LiAlH_4$.

$A$ and $B$ in the following reaction are :-

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