Question

The incorrect statement about the above reaction is:

• A. the name of reaction is Reimer Tiemann's reaction
• B. the intermediate in the reaction is dichloro carbene
• C. the final product is o-hydroxy benzaldehyde
• D. the final product is benzyl chloride

Answer 1

Answer: (D)

the final product is benzyl chloride

Option D is the incorrect statement. The final product in the reaction is Salicylaldehyde (or o-hydroxy benzaldehyde). It is an example of Reimer Tiemann reaction. Phenol in presence of $NaOH/KOH$ reacts with chloroform.
The eletrophile attacking the ring is dichlorocarbene $:CC{l}_2$.

Dichlorocarbene is formed by the action of strong alkali on chloroform:

$CHC{l}_3+O{H}^{-}\to :CC{l}_3^{-}+H_{2}O$

$:CC{l}_3^{-}\to :CC{l}_2+C{l}^{-}$