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Beryllium azide

Summary

Beryllium azide, Be(N3)2, is an inorganic compound. It is the beryllium analog of hydrazoic acid (HN3).

Beryllium azide
Names
IUPAC name
Beryllium azide
Identifiers
  • 44606-75-9 checkY
3D model (JSmol)
  • Interactive image
  • 129631211
  • InChI=1S/Be.2N3/c;2*1-3-2/q+2;2*-1
    Key: FGTDFEYQGIRFTE-UHFFFAOYSA-N
  • [Be+2].[N-]=[N+]=[N-].[N-]=[N+]=[N-]
Properties
Be(N3)2
Molar mass 93.054 g·mol−1
Appearance white solid[1]
Hazards
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.002 mg/m3
C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be)[2]
REL (Recommended)
 Ca C 0.0005 mg/m3 (as Be)[2]
IDLH (Immediate danger)
 Ca [4 mg/m3 (as Be)][2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Synthesis edit

Beryllium azide has been synthesised by the reaction of beryllium chloride with neat trimethylsilyl azide:[3]

BeCl2 + 2 Me3SiN3 → Be(N3)2 + 2 Me3SiCl

Alternatively, dimethylberyllium reacts with hydrazoic acid in dry diethyl ether at −116 °C:[1]

Be(CH3)2 + 2 HN3 → Be(N3)2 + 2 CH4

Structure edit

Infrared and Raman spectra suggest that beryllium azide consists of infinite chains, with tetrahedrally coordinated beryllium(II) atoms covalently bridged by one end of the azide units.[3]

References edit

  1. ^ a b Wiberg, E.; Horst, M. (1954). "Beryllium azide, Be(N3)2". Zeitschrift für Naturforschung B. 9: 502.
  2. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ a b Klapötke, T. M.; Schutt, T. (1999). "Synthesis and spectroscopic characterization of beryllium azide and two derivatives". Main Group Metal Chemistry. 22 (6): 357–360. doi:10.1515/MGMC.1999.22.6.357. S2CID 101174968.