Question

$\mathrm{S_N}1$ reactions are favoured by

• A. non-polar solvents
• 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

Hint:

$\mathrm{S_N1}$ is favoured by tertiary alkyl halides and polar protic solvents.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
$\mathrm{S_N1}$ is favoured by stable carbocation intermediates.
Step 2: Detailed Explanation:
Bulky groups stabilize the carbocation intermediate and hinder $\mathrm{S_N2}$ attack, thus favouring $\mathrm{S_N1}$.
Step 3: Final Answer:
$\mathrm{S_N1}$ is favoured by bulky groups.