JEE PYQ: Haloalkanes And Haloarenes Question 16
Question 16 - 2019 (09 Apr Shift 2)
Which of the following potential energy (PE) diagrams represents the $\text{S}_\text{N}1$ reaction?
(1) Two-humped curve with one intermediate (higher first peak)
(2) Two-humped curve with one intermediate (lower curve)
(3) Single-humped curve
(4) Single-humped curve (lower)
Show Answer
Answer: (1)
Solution
The $\text{S}_\text{N}1$ reaction energy diagram illustrates the dominant part of the substrate with respect to the reaction rate. The rate determining step is the formation of the intermediate carbocation. It shows two transition states with one intermediate (carbocation) between them.