Hydrocarbons Question 266
Question: In the presence of peroxide, $ HCl $ and HI do not give anti-Markownikoff’s addition of alkenes because:
Options:
A) One of the steps is endothermic in $ HCl $ and HI
B) Both $ HCl $ and HI are strong acids
C) $ HCl $ is oxidizing and the HI is reducing
D) All the steps are exothermic is $ HCl $ and HI
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Anti-Markownikoff addition is possible only in case of $ HBr $ and not in $ HCl $ and HI.
In $ HBr $ both the chain initiation and propagation steps are exothermic, while in $ HCl $ , first step is exothermic, and second step is endothermic and in HI, no step is exothermic.
Hence $ HCl $ and HI do not undergo anti- Markownikoff’s addition.
BETA
