Cyclopentanone xrightarrow[text{traces of } K | vedclass

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(D) $1$. The reaction of cyclopentanone with $HCN$ in the presence of traces of $KOH$ gives the cyanohydrin,$A$ ($1$-hydroxycyclopentanecarbonitrile).

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cyclohexanone

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(D) $1$. The reaction of cyclopentanone with $HCN$ in the presence of traces of $KOH$ gives the cyanohydrin,$A$ ($1$-hydroxycyclopentanecarbonitrile).$2$. Reduction of $A$ with $LiAlH_4$ gives the amine,$B$ ($1$-(aminomethyl)cyclopentan$-1-$ol).$3$. Treatment of $B$ with $NaNO_2/HCl$ (diazotization) forms a diazonium salt,which is unstable and loses $N_2$ gas.$4$. This leads to a ring expansion rearrangement (Tiffeneau-Demjanov rearrangement) to form cyclohexanone,$C$.

Cyclopentanone $\xrightarrow[\text{traces of } KOH]{HCN} A$ $\xrightarrow{LiAlH_4} B$ $\xrightarrow{NaNO_2, HCl} C$
$C$ is

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Cyclopentanone $\xrightarrow[\text{traces of } KOH]{HCN} A$ $\xrightarrow{LiAlH_4} B$ $\xrightarrow{NaNO_2, HCl} C$$C$ is