Which of the following alkyl halides will undergo the fastest S_N2 reaction?

Name: Which of the following alkyl halides will undergo the fastest S N 2 reaction?
Brand: Quizplus
Rating: 4.8 (49 reviews)

Question

Quizplus · Accepted Answer

The rate of the S_N2 reaction depends on the stability of the carbocation intermediate formed. The more stable the carbocation, the faster the reaction. In this case, alkyl halide I has a tertiary carbocation intermediate, which is the most stable of all the options. Therefore, it will undergo the fastest S_N2 reaction.

Which of the Following Alkyl Halides Will Undergo the Fastest