Benzene diazonium chloride is an extremely versatile synthetic intermediate. Which of the following — Aromatic Hydrocarbons Chemistry Question

💡 Solution & Explanation

The Balz-Schiemann reaction uses fluoroboric acid to precipitate the diazonium fluoroborate, which yields fluorobenzene upon controlled heating. Hypophosphorous acid or ethanol efficiently reduces diazonium salts down to benzene. The Sandmeyer reaction utilizes cuprous halides to introduce halogens. Phenol is formed simply by warming the diazonium salt with dilute aqueous acid/water; the extreme conditions in option D describe Dow's process on chlorobenzene.