Explanatory notes
… (halogen compounds ). (2) The same compounds as under (1) above, combined with oxygen ( halide oxides ). or (3) … chlorate, from phosphorus pentachloride treated with boric acid, or by the action of carbonyl chloride on … (b) Phosphorus fluorides and silicon fluorides . (c) Boron trifluoride (BF 3 ). Obtained by heating natural …