Thallium azide

Thallium azide

Names
IUPAC name Thallium(I) azide
Other names thallium azide
Identifiers
CAS Number	13847-66-0 Y
3D model (JSmol)	Interactive image
ChemSpider	15368504 Y
PubChem CID	22764821
InChI InChI=1S/N3.Tl/c1-3-2;/q-1;+1 Y Key: GMUSFHMEMWCQIE-UHFFFAOYSA-N Y InChI=1/N3.Tl/c1-3-2;/q-1;+1 Key: GMUSFHMEMWCQIE-UHFFFAOYAP
SMILES [Tl+].[N-]=[N+]=[N-]
Properties
Chemical formula	TlN3
Molar mass	246.40 g·mol−1
Appearance	yellow-brown crystals
Solubility in water	insoluble
Structure
Crystal structure	Tetragonal, tI16
Space group	I4/mcm, No. 140
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	very toxic
GHS labelling:
Pictograms
Signal word	Danger
NFPA 704 (fire diamond)	<imagemap> File:NFPA 704.svg|80px|alt=NFPA 704 four-colored diamond poly 150 150 300 300 150 450 0 300 Health 4: Very short exposure could cause death or major residual injury. E.g. VX gas poly 300 0 450 150 300 300 150 150 Flammability 0: Will not burn. E.g. water poly 450 150 600 300 450 450 300 300 Instability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxide poly 300 300 450 450 300 600 150 450 Special hazards (white): no code desc none </imagemap> 4 0 3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Thallium azide, TlN₃, is a yellow-brown crystalline solid poorly soluble in water. Although it is not nearly as sensitive to shock or friction as lead azide, it can easily be detonated by a flame or spark. It can be stored safely dry in a closed non-metallic container.

Preparation and structure

Thallium azide can be prepared treating an aqueous solution of thallium(I) sulfate with sodium azide. Thallium azide will precipitate; the yield can be maximized by cooling.

TlN₃, KN₃, RbN₃, and CsN₃ adopt the same structures. The azide is bound to eight cations in an eclipsed orientation. The cations are bound to eight terminal N centers.

Coordination sphere of azide in KN₃, RbN₃, CsN₃ and TlN₃.

Safety

All thallium compounds are poisonous and should be handled with care; avoid breathing any dust or fumes.