What is the product obtained when benzonitrile is treated with C_6H_5MgBr in dry ether and then hydrolyzed?

MHT CET 2024 Chemistry question

What is the product obtained when benzonitrile is treated with in dry ether and then hydrolyzed?

(A)Phenol
(B)BenzophenoneCorrect
(C)Benzyl amine
(D)Benzene

Answer: (B)

Solution

The Grignard reagent adds across the bond of the nitrile to form an imine salt, which on acid hydrolysis gives a ketone: C_6H_5CC_6H_5MgBr\xrightarrow{dry\ ether}C_6H_5C_6H_5\xrightarrow{H_3O^+}C_6H_5C_6H_5$

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Question ID VK-092919