The correct set of products obtained in the following reactions is: (A) RCN Reduction (B) RCN [ 2. H_2O] 1. CH_3MgBr (C) RNC Hydrolysis (D) RNH_2 HNO_2

JEE Main Chemistry question

The correct set of products obtained in the following reactions is:

(A) (B) (C) (D)

(A)2° amine, Methyl ketone, 1° amine, Alcohol
(B)1° amine, Methyl ketone, 1° amine, AlcoholCorrect
(C)2° amine, Methyl ketone, 2° amine, Acid
(D)2° amine, Methyl ketone, 2° amine, Aldehyde

Answer: (B)

Solution

(A) Catalytic/chemical reduction of a nitrile adds 4 hydrogens across the triple bond, giving a 1° amine, . (B) A Grignard reagent adds to the nitrile, and aqueous workup hydrolyses the resulting imine-magnesium salt to a methyl ketone,

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Question ID VK-150424