Osmium tetrabromide

Osmium tetrabromide is the inorganic compound with the formula OsBr₄. A black solid, this compound can be produced by heating osmium tetrachloride and bromine under pressure.

Osmium tetrabromide

Names
Other names osmium(IV) bromide
Identifiers
CAS Number	59201-52-4 Y
3D model (JSmol)	Interactive image
ChemSpider	21494153
PubChem CID	101978335
InChI InChI=1S/4BrH.Os/h4*1H;/q;;;;+4/p-4 Key: MPVSPHKBQDMOHE-UHFFFAOYSA-J
SMILES [Br-].[Br-].[Br-].[Br-].[Os+4]
Properties
Chemical formula	OsBr4
Molar mass	509.85 g·mol−1
Appearance	black solid
Density	5.95 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Structure

As determined by X-ray crystallography, osmium tetrabromide is an inorganic polymer. It is isomorphous with platinum tetrabromide and technetium tetrachloride. As such, osmium is in octahedral coordination. Each osmium center bonds to four doubly bridging bromide ligands and two mutually cis terminal bromide ligands.^[1]

Related compounds

OsBr₃ is the only other binary osmium bromide is that has been crystallized.^[2]