Silver tetrafluoroborate Silver tetrafluoroborate Silver tetrafluoroborate is an inorganic compound with the chemical formula AgBF. It is a white solid that dissolves in polar organic solvents as well as water. In its solid state, the Ag centers are bound to fluoride. Silver tetrafluoroborate is prepared by the reaction between boron trifluoride and silver oxide in the presence of benzene. In the inorganic and organometallic chemistry laboratory, silver tetrafluoroborate, sometimes referred to "silver BF-4", is a useful reagent. In dichloromethane, silver tetrafluoroborate is a moderately strong oxidant. Similar to silver hexafluorophosphate, it is commonly used to replace halide anions or ligands with the
The Silver Branch (Sutcliff novel) himself Carausius's hound and who wears a dog's tail as part of his motley. Subtle allusions to the silver branch recur in other novels in the Eagle of the Ninth series, and it presumably refers to the otherworldly musical instrument mentioned in the medieval Irish narrative The Voyage of Bran. The Silver Branch was also a symbol of authority and a temporary "pass card" used by the Celts, consisting of a sprig of mistletoe or an apple branch. "The Silver Branch" is #2 in the Roman Britain Series, following "The Eagle of the Ninth" (1954) and preceding "Frontier Wolf" (1980),