Direct iodination of benzene using alone is difficult and results in poor yields because the reaction is readily reversible. Which of the following reagents must be added to the reaction mixture to fo

Question

Direct iodination of benzene using $I_2$ alone is difficult and results in poor yields because the reaction is readily reversible. Which of the following reagents must be added to the reaction mixture to force the iodination to completion?

Prashant Kotian · Accepted Answer

Correct answer: C. Iodination of benzene is reversible because the byproduct, hydroiodic acid (), is a strong reducing agent that can reduce iodobenzene back to benzene. To prevent this reverse reaction and drive the equilibrium forward, strong oxidizing agents like or are added to oxidize back to .

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