Aryl halides are generally unreactive towards nucleophilic substitution. However, they can be converted to phenols under drastic conditions. Which of the following methods are used to prepare phenol f

Question

Aryl halides are generally unreactive towards nucleophilic substitution. However, they can be converted to phenols under drastic conditions. Which of the following methods are used to prepare phenol from chlorobenzene, which can subsequently be reduced to benzene?

Prashant Kotian · Accepted Answer

Correct answer: A,B. Dow's process involves treating chlorobenzene with at and high pressure to generate phenoxide, which is then acidified to phenol. In the Raschig process, chlorobenzene is hydrolyzed by superheated steam over a catalyst at to yield phenol. Both reactions overcome the strong bond in aryl halides. The Wurtz-Fittig reaction forms alkylbenzenes.

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