Nitrogen tribromide

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Nitrogen tribromide
Stickstofftribromid2.svg Nitrogen tribromide molecule
CAS number 15162-90-0
PubChem 3082084
ChemSpider 20480821
Jmol-3D images Image 1
Molecular formula Br3N
Molar mass 253.72 g mol−1
Appearance unstable solid
Melting point explodes at -100°C[1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Nitrogen tribromide is a chemical compound with the formula NBr3. It is extremely explosive in its pure form, even at −100°C, and was not isolated until 1975.[2] It is a deep-red, volatile solid, and was first prepared by the bromination of bistrimethlysilylbromamine with BrCl at −87°C:

(Me3Si)2NBr + 2 BrCl → NBr3 + 2 Me

It reacts instantly with ammonia in dichloromethane solution at −87°C to yield NBrH2.


  1. ^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–73, ISBN 0-8493-0594-2 
  2. ^ N. N. Greenwood and A. Earnshaw, "Chemistry of the Elements", 2006 Butterworth-Heinemann