Beryllium azide

Beryllium azide, Be(N3)2, is an inorganic compound.

Beryllium azide
Names
IUPAC name
Beryllium azide
Identifiers
3D model (JSmol)
Properties
BeN6
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
Not to be confused with beryllium nitride, Be3N2.

Synthesis

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

BeCl2 + 2Me3SiN3 → Be(N3)2 + 2Me3SiCl

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

Be(CH3)2 + 2HN3 → Be(N3)2 + 2CH4

Structure

IR and Raman spectra suggest that beryllium azide consists of infinite chains, with tetrahedrally coordinated Be2+ ions linked by end-on bridging N3− ions.[3]

References
  1. Wiberg, E.; Horst, M. (1954). "Beryllium azide, Be(N3)2". Zeitschrift für Naturforschung B. 9: 502.
  2. NIOSH Pocket Guide to Chemical Hazards. "#0054". National Institute for Occupational Safety and Health (NIOSH).
  3. 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.
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