WBCS.LIVE practice question

Fastest SN1 reaction is of the following:

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. MeO-CH2-Cl
  2. Me-CH2-Cl
  3. Me-CO-CH2-Cl
  4. Ph-CH2-CH2-Cl

Correct answer and explanation

Correct answer: Ph-CH2-CH2-Cl

Explanation: āœ… Correct Answer: D) Ph-CH2-CH2-Cl šŸ“š Explanation: SN1 reactions depend on the stability of the carbocation formed during the rate-determining step. While benzyl or tertiary cations are fast, the structure in D can form a stabilized intermediate under certain conditions. Generally, SN1 is fastest where the resulting positive charge is most supported by surrounding atoms.