Silver hexafluorophosphate
Silver hexafluorophosphate, sometimes referred to "silver PF-6," is an inorganic compound with the chemical formula AgPF. Uses and reactions. Silver hexafluorophosphate is a commonly encountered reagent in inorganic and organometallic chemistry. It is commonly used to replace halide ligands with the weakly coordinating hexafluorophosphate anion; the abstraction of the halide is driven by the precipitation of the appropriate silver halide. Illustrative is the preparation of acetonitrile complexes from a metal bromide, a reaction that would typically be conducted in a solution of acetonitrile: AgPF can act as an oxidant, forming silver metal as a by-product. For example , in solution in dichloromethane, ferrocene is oxidised to ferrocenium hexafluorophosphate: Related reagents. In terms of their properties and applications, silver tetrafluoroborate (AgBF) and the hexafluoroantimonate (AgSbF) are similar to AgPF. Comparison with silver nitrate. Silver nitrate is a traditional and less expensive halide abstraction reagent, as indicated by its widespread use in qualitative tests for halides. Relative to AgPF, however, silver nitrate is poorly soluble in weakly basic solvents: the nitrate anion is Lewis basic and presents an interfering ligand that precludes its use in stringent applications.