Polonium dibromide (also known as polonium(II) bromide) is a chemical compound with the formula PoBr2. This salt 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]
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Systematic IUPAC name
Polonium dibromide | |
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
PoBr2 | |
Molar mass | 369.791 g mol−1 |
Appearance | purple-brown crystalline solid[1][2] |
Melting point | 270 °C (518 °F; 543 K) (decomposes)[1][2] (sublimes at 110 °C)[2] |
Solubility | soluble 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).
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Polonium dibromide may be prepared by:
Polonium dibromide forms purple solutions in hydrobromic acid (prepared similarly to solutions of polonium dichloride) and ketones, although the latter are rapidly oxidised to polonium(IV). Solid polonium dibromide is rapidly reduced to metallic polonium upon reaction with ammonia.[2]