[limpet chicken]

PCl5 reacts with ammonia to yield a substance which when heated strongly, losed NH3Cl and HCl, to leave PNH, a white infusible substance capable of producing secondary amines from the corresponding primary alcohol.

I want to try this myself, but have no phosphorus pentachloride available, will the pentabromide also work for this reaction? to lose ammonium bromide and HBr?

Or will the synthesis of PCl5, adapted to use Br2 work, combining Br2 and white or red P at very low temepratures, or perhaps combining the vapors of P and Br and condensing together?