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BITSAT 2017
Exam
BITSAT
Year
2017
Subject
Chemistry
Chapter
Amines

BITSAT 2017 · Chemistry · Amines

In the reaction,& CH _ 3 · CH _ 2 · Cl KCN ⟶ (A) LiAlH4 ⟶ (P) end...

In the reaction,&

CH3⋅CH2⋅Cl⟶KCN(A){CH}_{3} \cdot {CH}_{2} \cdot Cl\overset{KCN}{⟶} \left(A\right)\overset{LiAlH4}{⟶} \left(P\right)endproduct(P)end product \left(P\right) is

Options

  1. ACH3CH2⋅NO2{CH}_{3}{CH}_{2} \cdot {NO}_{2}
  2. BCH3CH2CH2NO2{CH}_{3}{CH}_{2}{CH}_{2}{NO}_{2}
  3. CCH3CH2NH2{CH}_{3}{CH}_{2}{NH}_{2}
  4. DCH3⋅CH2⋅CH2NH2{CH}_{3} \cdot {CH}_{2} \cdot {CH}_{2}{NH}_{2}

Correct answer

D. CH3⋅CH2⋅CH2NH2{CH}_{3} \cdot {CH}_{2} \cdot {CH}_{2}{NH}_{2}

Step-by-step solution

When the reducing agent is lithium aluminium hydride, the aldehyde group is reduced to primary alcohol but the carbon-carbon double bond is unaffected.

In the given reaction the end product is (d). It is obtained
as follows.

CH3CH2⋅Cl⟶KCNCH3CH2CN(A)→(Reduction)LiAlH4CH3CH2CH2⋅NH2{CH}_{3}{CH}_{2} \cdot Cl\overset{KCN}{⟶}\mathop{{CH}_{3}{CH}_{2}CN}_{( A )}\mathop{→}_{( Reduction )}^{LiAlH4}{CH}_{3}{CH}_{2}{CH}_{2} \cdot {NH}_{2}

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