Bromine azide

Bromine azide
Names
	IUPAC name Bromine azide
	Other names Bromine nitride, Nitrogen bromide, Azidobromide
Identifiers
CAS Number	13973-87-0;
3D model (JSmol)	Interactive image;
CompTox Dashboard (EPA)	DTXSID50161155 ;
	SMILES [N-]=[N+]=NBr;
Properties
Chemical formula	BrN3
Molar mass	121.924 g/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	This is a poison that can spontaneously explode. It explodes on contact with arsenic, sodium, silver foil, or phosphorus. It has a hazard class of 1.1A.
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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Properties

Bromine azide has been described as a crystal or a red liquid at room temperature. It is extremely sensitive to small variations in temperature and pressure, thus extreme caution must be observed when working with this reagent. This property of bromine azide has led to difficulty in discerning its crystal structure, with explosions occurring at Δp ≥ 0.05 Torr and also upon crystallization. Despite this, a crystal structure of bromine azide has been obtained using a miniature zone-melting procedure with focused infrared laser radiation. In contrast to IN₃, which forms an endless chain-like structure upon crystallization, BrN₃ forms a helical structure.

Production

Bromine azide is produced through the reaction of sodium azide with Br₂. This reaction forms bromine azide and sodium bromide.

Reactions

Bromium azide adds to alkenes both through ionic and free-radical addition, each giving an opposite orientation in the products. The ionic addition occurs stereospecifically in trans. ^[2]

Safety

Great care must be taken when handling bromine azide as it is potentially toxic and is able to explode under various conditions. The amount of compound used during experimentation should be limited to 2 mmol. Safety shields, safety glasses, face shields, leather gloves, and protective clothing such as leather suits and ear plugs should be worn for protection in the event of an explosion. Teflon containers should be used whenever possible to prevent hazardous fragmentation.

References

^ Patnaik, Pradyot (2007). A Comprehensive Guide to the Hazardous Properties of Chemical Substances. 615: Wiley-Interscience. p. 615. ISBN 0-471-71458-5.{{cite book}}: CS1 maint: location (link)
^ Liu, Robert (1968). "2,3-Bis(perfluormethyl)bicyclo2.2.2]octa-2,5,7-trienes and their photorearrangement reactions". J.Am.Chem.Soc. 90 (1): 215–216. doi:10.1021/ja01003a041. Retrieved 10/19/2012. {{cite journal}}: Check date values in: |accessdate= (help)

[1] Patnaik, Pradyot (2007). A Comprehensive Guide to the Hazardous Properties of Chemical Substances. 615: Wiley-Interscience. p. 615. ISBN 0-471-71458-5.{{cite book}}: CS1 maint: location (link)

[2] Liu, Robert (1968). "2,3-Bis(perfluormethyl)bicyclo2.2.2]octa-2,5,7-trienes and their photorearrangement reactions". J.Am.Chem.Soc. 90 (1): 215–216. doi:10.1021/ja01003a041. Retrieved 10/19/2012. {{cite journal}}: Check date values in: |accessdate= (help)

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