Q33 / 170 · Manipal (MET) 2018 · Chemistry

$\mathrm{S}_{\mathrm{N}} 1$ reactions are favoured by

  • A
    non-polar solvents
  • Correct answer
    B
    bulky groups on the carbon atom attached to the halogen atom
  • C
    small groups on carbon atom attached to the halogen atom
  • D
    None of the above

Solution

Bulky groups on the carbon atom attached to the halogen atom will hinder attack by $\mathrm{S}_{\mathrm{N}} 2$ mechanism due to steric hindrance and hence, would favour $\mathrm{S}_{\mathrm{N}} 1$ mechanism.

Hence, the correct answer is option: 'B'.

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