MHT CET 2024 Chemistry question

Identify the Product 'B' in the following series of reaction Isopropylcyanide \xrightarrow[HCl]{SnCl_2} A \xrightarrow{H_3O^+} B + NH_4Cl

(A)Propanal
(B)Propanone
(C)2-MethylpropanalCorrect
(D)2-Methylpropanoic acid

Answer: (C)

Solution

This is the Stephen reaction. Isopropyl cyanide is . /HCl (followed by hydrolysis) reduces the nitrile to the imine hydrochloride: (CH_3)_2CH-CN \rightarrow (CH_3)_2CH-CH=NH\cdot HCl (A). Hydrolysis with gives the aldehyde

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Question ID VK-093236