In the given reaction (CH)3-(CH)2-C≡ N overset(i) (CH)3 MgBr (. ii .) H3 O+ arrow [X] [X] will be

Question

In the given reaction (CH)3-(CH)2-C≡ N overset(i) (CH)3 MgBr (. ii .) H3 O+ arrow [X] [X] will be (A) Option 1

(B)

(C)

(D)

Tardigrade Admin · Accepted Answer

It is a nucleophilic addition reaction. Nitriles being moderate electrophiles, attacked by nucleophilic Grignard reagent to give an imine salt. Since imines are not electrophilic enough under basic conditions further attack doesn't take place.Acidic hydrolysis of this imine salt leads to ketone. Here, butan-2-one is formed as follows:
Solution

Q. In the given reaction (CH)3​−(CH)2​−C≡N→(i)(CH)3​MgBr(ii)H3​O+[X] [X] will be

Q. In the given reaction
$(C H)_{3} - (C H)_{2} - C \equiv N \to (i) (C H)_{3} M g B r (ii) H_{3} O^{+} [X]$ [X] will be