JEE PYQ: Hydrocarbons Question 2
Question 2 - 2021 (16 Mar Shift 2)
Benzene reacts with reagent ‘A’ to give 1-chloro-2-chloromethylbenzene (chlorine on ring and $\text{CH}_2\text{Cl}$ at adjacent position). Identify the reagent(s) ‘A’ and condition(s) for the reaction:
(1) A = HCl; Anhydrous $\text{AlCl}_3$
(2) A = HCl, $\text{ZnCl}_2$
(3) A = $\text{Cl}_2$; UV light
(4) A = $\text{Cl}_2$; dark, Anhydrous $\text{AlCl}_3$
Show Answer
Answer: (3)
Solution
For substitution at allylic position in the given compound, the reagent used is $\text{Cl}_2$/UV light. The reaction is free radical halogenation.
BETA
