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Haloalkanes and Haloarenes question

2016 · Q117
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Haloalkanes and Haloarenes question

2016 · Q117

NEETChemistryHaloalkanes and HaloarenesMCQ+4 / −1
Consider the reaction,
CH3CH2CH2Br + NaCN →\to→ CH3CH2CH2CN + NaBr

This reaction will be the fastest in
  1. A
    ethanol
  2. B
    methanol
  3. C
    N, N' -dimethylformamide (DMF)
  4. D
    Water
View written solutionFree

Correct answer: C

The reaction,
CH3CH2CH2Br + NaCN →\to→ CH3CH2CH2CN + NaBr

follows SN2 mechanism which is favoured by polar aprotic solvent i.e., N, N'–dimethylformamide (DMF).

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