Nitrogen tribromide

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Nitrogen tribromide
Stickstofftribromid2.svg
Nitrogen tribromide molecule
Names
IUPAC name
nitrogen tribromide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/3BrH.N/h3*1H;/p-3
  • N(Br)(Br)Br
Properties
NBr3
Molar mass 253.7187 g/mol
Appearance Deep red solid
Melting point Explodes at -100 °C[1]
Except where otherwise noted, 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 and volatile solid.

Preparation[]

NBr3 was first prepared by reaction of bistrimethlysilylbromamine (bis(trimethylsilyl)amine bromide) with bromine monochloride (with trimethylsilyl chloride as byproduct) at −87 °C according to the following equation:

(Me3Si)2NBr + 2 BrCl → NBr3 + 2 Me
3SiCl

where "Me" is a methyl group. It reacts instantly with ammonia in dichloromethane solution at −87 °C to yield NBrH2.

References[]

  1. ^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, Florida: CRC Press, pp. 4–73, ISBN 0-8493-0594-2
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 439. ISBN 978-0-08-037941-8.
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