Polonium dibromide

Polonium dibromide
Names
Systematic IUPAC name
Polonium dibromide
Identifiers
3D model (JSmol)
Properties
PoBr2
Molar mass369.791 g mol−1
Appearancepurple-brown crystalline solid[1][2]
Melting point 270 °C (518 °F; 543 K) (decomposes)[1][2] (sublimes at 110 °C)[2]
Solubilitysoluble in hydrobromic acid and ketones[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Polonium dibromide (also known as polonium(II) bromide) is a chemical compound with the formula PoBr2. It is a purple-brown crystalline solid at room temperature.[1][2] It sublimes (decomposing slightly) at 110 °C/30 μ and decomposes when melted in nitrogen gas at 270–280 °C.[2]

Preparation

Polonium dibromide may be prepared by:

  • thermal degradation of polonium tetrabromide (PoBr4) in a vacuum at 200 °C;[2]
  • dehalogenation of polonium tetrabromide by hydrogen sulfide at low temperatures (however, this does not form pure polonium dibromide, even upon heating).[1][2]