during-the-sulfonation-of-benzene-what-role-does-sulfur-trioxide-play-and-how-ca

Question

During the sulfonation of benzene, what role does sulfur trioxide play and how can the sulfonated product be reverted back to benzene?

Accepted Answer

Sulfur trioxide provides the electrophile; desulfonation is achieved by heating with dilute aqueous acid.

Answer

Sulfur trioxide stabilizes benzene; desulfonation is achieved by UV light exposure.

Answer

Sulfur trioxide is a solvent in the reaction; desulfonation requires a base.

Answer

Sulfur trioxide acts as a catalyst; the product can be reverted by heating with dilute acid.