. Butanenitrile may be prepared by heating

A: propyl alcohol with KCN

B: butyl alcohol with KCN

C: butyl chloride with KCN

D: propyl chloride with KCN


Best Answer


  • The hydroxyl group of alcohol cannot react with KCN in normal  reaction conditions as OH group is a poor leaving group.
  • So Butanenitrile can be prepared by heating propyl chloride with KCN.

CH2 CH3 CH2 C1 + KCNΔ→ CH3 Ch2 CH2 CN

  • It is an example of SN2reaction.

Final Answer:-

The correct option is (D) propyl chloride with KCN.


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