Reactions · Wikipedia: Category:Name reactions
Balz–Schiemann reaction
Overview
The Balz–Schiemann reaction (also called the Schiemann reaction) is a chemical reaction in which an aryl diazonium salt is transformed to an aryl fluoride. This reaction is a traditional route to fluorobenzene and some related derivatives, including 4-fluorobenzoic acid. Traditionally, the diazonium tetrafluoroborate is prepared from an aniline derivative by diazotization using NaNO2 and fluoroboric acid (aq. HBF4). The isolated diazonium tetrafluoroborate is then heated to temperatures up to 200 °C after mixing the compound with sand or slurrying it in a high boiling paraffin in order to ensure even heating and to disperse the large amount of heat and gases generated.
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