Beryllium azide

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
CAS Number	44606-75-9 Y
3D model (JSmol)	Interactive image
ChemSpider	103867673
PubChem CID	129631211
CompTox Dashboard (EPA)	DTXSID101046664
InChI InChI=1S/Be.2N3/c;2*1-3-2/q+2;2*-1 Key: FGTDFEYQGIRFTE-UHFFFAOYSA-N
SMILES [Be+2].[N-]=[N+]=[N-].[N-]=[N+]=[N-]
Properties
Chemical formula	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). Y verify (what is YN ?) 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 + 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

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]