Atomistry » Boron » Chemical properties » Boron tribromide
Atomistry »
  Boron »
    Chemical properties »
      Boron tribromide »

Boron tribromide, BBr3

Boron tribromide, BBr3, its preparation and purification may be carried out as described for the chloride.

Boron tribromide is a colourless, mobile liquid which boils at 90.5° C. and solidifies to a colourless mass which melts at -46° C. Its density is 2.6499 at 0° C. and 2.6175 at 16.5°. The vapour density is normal; the vapour pressure is as follows: -

°C.mm.°C.mm.°C.mm.°C.mm.°C.mm.
-500.7-205.510324013070390
-401.5-1010 520545019380540
-30301930856028090730


Boron tribromide reacts with ammonia at 0° to form boron imide.

2BBr3 + 27NH3 = B2(NH)3 + 6NH4Br.3NH3.

With phosphine, boron tribromide forms a white, solid substance of the formula BBr3.PH3.9 The corresponding arsenic compound BBr3.AsH3, prepared by the direct union of arsine and boron tribromide at - 100°, is a very unstable, white, amorphous solid, which, on keeping in the dark at 0°, slowly decomposes into boron tribromide, arsenic, and hydrogen. The following addition-compounds are also known: BBr3.PBr3, BBr3.PBr5, 2BBr3.PCl3, 2BBr3.PCl6, and 2BBr3.P2I4.

Last articles

Fe in 2YXO
Fe in 2YRS
Fe in 2YXC
Fe in 2YNM
Fe in 2YVJ
Fe in 2YP1
Fe in 2YU2
Fe in 2YU1
Fe in 2YQB
Fe in 2YOO
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy