Polonium dibromide

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Polonium dibromide
Identifiers
CAS number 66794-54-5
Jmol-3D images Image 1
Properties
Molecular formula PoBr2
Molar mass 369.791 g mol−1
Appearance purple-brown crystalline solid[1][2]
Melting point 270 °C (decomposes)[1][2] (sublimes at 110 °C)[2]
Solubility soluble in hydrobromic acid and ketones[2]
Except where noted otherwise, 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[edit]

Polonium dibromide may be prepared by:

Chemistry[edit]

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]

References[edit]

  1. ^ a b c d Holleman, A. F.; Wiberg, E. (2001), Inorganic Chemistry, San Diego: Academic Press, p. 594, ISBN 0-12-352651-5 
  2. ^ a b c d e f g h i Bagnall, K. W. (1962). "The Chemistry of Polonium". Advances in Inorganic Chemistry and Radiochemistry. New York: Academic Press. pp. 197–230. ISBN 978-0-12-023604-6. Retrieved June 14, 2012.