Question

Select the incorrect statement about Kolbe's reaction.

• A. Phenoxide ion is less reactive than phenol towards electrophilic aromatic substitution
• B. A weak electrophile $C{O}_2$ is used in this reaction
• C. Ortho-hydroxybenzoic acid is formed as the main product
• D. Salicylic acid is formed as the main product

Answer 1

Answer: (A)

Phenoxide ion generated by treating phenol with $NaOH$ is even more reactive than phenol towards electrophilic aromatic substitution. Hence, it undergoes electrophilic substitution with $C{O}_2$, (a weak electrophile) and ortho-hydroxybenzoic acid is formed as the main product. (Kolbe's reaction)