Phosphorus tribromide trifluoride

An attempt to prepare 1 -bromo-2-fluoroethane by the partial fluorination of ethylene dibromide by means of antimony trifluoride was not very successful. The compound was best prepared by the action of phosphorus tribromide on F.E.A. The compound was relatively non-toxic and the bromine atom rather unreactive, but considerably more reactive than the chlorine atom in chlorofluoroethane. For example, bromofluoroethane was readily converted by means of potassium thiocyanate into 2-fluoroethyl thiocyanate. As a lethal inhalant the toxicity of the thiocyanate was inferior to that of M.F.A. Toxicity by injection, however, appeared to be higher. 

Phosphorus tribromide is also suitable as a starting material and zinc fluoride has been used as a,n alternative source of fluorine (188). Arsenic trifluoride is prepared from As406 and HF, produced from CaF2 and concentrated sulfuric acid (191). 

Phosphorus tribromide stereochemistry, 36 Phosphorus trichloride metal complexes solvolysis, 418 stereochemistry, 36 Phosphorus trifluoride stereochemistry, 36 Phosphorus trihalides stereochemistry, 36 Phosphorus triiodidc stereochemistry, 36 Photoaquation solid state, 471 Photocalorimetry, 410 Photochemical reactions, 397 applications, 408 mechanisms, 385 solid state, 470 Photochromism, 409 Photolysis... 

Antimony pentachloride Boron trichloride gas Boron trifluoride gas Boron trifluoride ethyl etherate Boron trifluoride methyl etherate Bromine trifluoride Phosphorus oxychloride Phosphorus pentachloride Phosphorus tribromide... 

Phosphorus Trifluoride, PF3.—Some early indications were obtained that phosphorus reacted with fluorides of zinc and lead,1,2 and that the fluoride resulting was a gas.3 This gas was prepared in 1884 by heating lead fluoride with copper phosphide in a brass tube.4 It is also produced by the action of fluorides of zinc, silver or lead on phosphorus trichloride or tribromide.5 One of the most convenient methods of preparation is by the reaction between arsenic trifluoride, which is easily prepared and purified, and phosphorus trichloride, thus —... 

---