Alcohols Phenols And Ethers Question 52
Question: Reaction of phenol with chloroform/sodium hydroxide to give $ o $ -hydroxy benzaldehyde involves the formation of
[J & K 2005]
Options:
A) Dichloro carbene
B) Trichloro carbene
C) Chlorine atoms
D) Chlorine molecules
Show Answer
Answer:
Correct Answer: A
Solution:
This is Reimer-Tiemann reaction where the electrophile is dichlorocarbene $ (:CCl_2) $ generated from chloroform by the action of a base. $ O{H^{-}}+CHCl_3 $ ⇌ $ HOH+:CCl_2^{-}\to C{l^{-}}+:CCl_2 $
BETA
