Q. Phenol on reaction with $CHCl_{3}$ and $NaOH$ give benzaldehyde. Intermediate of this reaction is
A) Carbocation
B) Carbanion
C) Radical
D) Carbene
Explanation
(d)
Reimer-Tiemann reaction this involves the treatment of phenol with chloroform in aqueous sodium hydroxide solution followed by acid hydrolysis. Salicyladehyde is formed.
[image:11_image286.emf]
In the above reaction, chloroform first reacts with sodium hydroxide to produce dichloro carbene which is the intermediate in this reaction.
[image:11_image287.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.