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प्रश्न
What is the action of Grignard reagent on benzonitrile?
उत्तर
Benzonitrile on reaction with the Grignard reagent in the dry ether as solvent followed by acid hydrolysis will form corresponding ketone derivative.
\[\begin{array}{cc}
\ce{\underset{\text{Benzonitrile}}{C6H5 - C ≡ N} + \underset{\text{Alkyl magnesium Ketone derivative halide (Grignard reagent)}}{RMgX} ->[dry ether] R - C = NMgX ->[H3O+] \underset{\text{Ketone derivative}}{RCO - C6H5} + NH3 + Mg(X)OH}\\
\phantom{........................}|\\
\phantom{............................}\ce{C6H5}
\end{array}\]
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\[\begin{array}{cc}
\phantom{...........}\ce{O}\\
\phantom{...........}||\\
\ce{C2H5 - N - H + CH3 - C - Cl ->[Pyridine][-HCl]}\\
|\phantom{......................}\\
\ce{C2H5}\phantom{..................}
\end{array}\]
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