Silver tetrafluoroborate

Silver tetrafluoroborate (AgBF₄; commonly referred to "silver BF-4") is an inorganic compound commonly encountered in inorganic and organometallic chemistry. Similar to silver hexafluorophosphate, it is commonly used to replace halide anions or ligands with the weakly-coordinating tetrafluoroborate anions. The abstraction of the halide is driven by the precipitation of the appropriate silver halide.