The use of arenediazonium hexafluoro-antimonates and -arsenates in the preparation of aryl fluorides

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Abstract
Thermolysis of arenediazonium hexafluoroantimonates containing electron-withdrawing substituents (nito- and carboxy-groups of fluorine) gives substantially better yields of the corresponding fluoro-compounds than the decomposition of diazonium salts of any other complex fluoro-acid so far reported. Arenediazonium hexafluoroarsenates with a free para-position when heated dry produce fluorine-substituted diarylarsonic acids; a mechanism is described for this reaction.