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NEET2016ChemistryHaloalkanes and HaloarenesActual

Consider the reaction C H 3 C H 2 C H 2 B r + N a C N → C H 3 C H 2 C H 2 C N + N a B r This reaction will be the fastest in

Options

  1. AEthanol
  2. BMethanol
  3. CN, N' - dimethylformamde (DMF)
  4. DWater

Correct answer

C. N, N' - dimethylformamde (DMF)

Step-by-step solution

The reaction proceeds via SN 2 mechanism. It is a unimolecular nucleophilic substitution reaction. The reaction is hence favoured in the presence of a polar aprotic solvent. DMF is a polar aprotic solvent. So, the reaction is the fastest with DMF solvent.

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