Which of the following has highest reactivity for S_N1 reactions?

MHT CET 2025 Chemistry question

Which of the following has highest reactivity for S1 reactions?

(A)n-Butyliodide
(B)sec-butyliodide
(C)Isobutyl iodide
(D)tert-Butyl iodideCorrect

Answer: (D)

Solution

In an reaction the slow step is ionisation of the alkyl halide to a carbocation, so the reactivity follows the stability of the carbocation formed: (hyperconjugation and +I effect of alkyl groups stabilise the positive charge). tert-Butyl iodide gives the tertiary carbocation

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-102238