Polonium tetrabromide
{{Chembox
|ImageFile=polonium tetrabromide.png
|Section3={{Chembox Structure
| CrystalStruct= cubic crystal system
| SpaceGroup= Fm{{overline|3}}m (No. 225)
| LattConst_a= 5.6 Å
}}
|Section1={{Chembox Identifiers
| CASNo= 60996-98-7
| PubChem = 22753593
| PubChem_Comment = (charge error)
| StdInChI=1S/4BrH.Po/h4*1H;/q;;;;+4/p-4
| StdInChIKey=MOAWHUMOOBCMOF-UHFFFAOYSA-J
|SMILES=Br[Po](Br)(Br)Br
}}
|Section2={{Chembox Properties
| Appearance= pale red solid{{citation|author=P. E. Figgins|date=1961|pages=13|publisher=National Academies|title=The Radiochemistry of Polonium}}
|Po=1|Br=4
| Density=
| MeltingPt=
| BoilingPt=
| SolubleOther= soluble in ethanol
soluble in bromine
}}
|Section8={{Chembox Related
|OtherCompounds=polonium tetrabromide
|OtherCations=selenium tetrabromide
tellurium tetrabromide
|OtherAnions=polonium tetrafluoride
polonium tetrachloride
polonium tetraiodide}}
}}
Polonium tetrabromide, is a bromide of polonium, with the chemical formula PoBr4.
Preparation
Polonium tetrabromide can be formed by the direct reaction of bromine and polonium at 200 °C to 250 °C.{{cite book|author=M. Schmidt, W. Siebert, K. W. Bagnall|title=The Chemistry of Sulphur, Selenium, Tellurium and Polonium: Pergamon Texts in Inorganic Chemistry|publisher=Elsevier|date=October 2013|page=960-961|isbn=978-1483158655}}
Like polonium tetraiodide, polonium tetrabromide can also be produced by the reaction of polonium dioxide and hydrogen bromide:
:{{chem2|PoO2 + 4 HBr -> PoBr4 + 2 H2O}}
Properties
Polonium tetrabromide is a light red solid that is easily deliquescent. It crystallizes in the cubic crystal system, with space group Fm3m (No. 225) and lattice parameter a = 5.6 Å.{{cite book|author=H. J. Emeléus, A. G. Sharpe|title=Advances in Inorganic Chemistry and Radiochemistry|publisher=Academic Press|date=January 1962|page=216|isbn=0080578535}}