Polonium tetrachloride

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Polonium tetrachloride
CAS number 10026-02-5
ChemSpider 4896024 YesY
Jmol-3D images Image 1
Molecular formula PoCl4
Molar mass 350.79 g/mol[1]
Appearance bright yellow crystalline solid[2]
Melting point ≈ 300 °C (in chlorine)[1][2]
Boiling point 390 °C[1][2]
Solubility in water soluble, but rather slow hydrolysis[1]
Solubility very soluble in hydrochloric acid and thionyl chloride, moderately soluble in ethanol and acetone, decomposes in dilute nitric acid[1]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Polonium tetrachloride (also known as polonium(IV) chloride) is a chemical compound with the formula PoCl4. It is a hygroscopic bright yellow crystalline solid at room temperature.[1] Above 200 °C, it tends to decompose into polonium dichloride and excess chlorine, similar to selenium tetrachloride and tellurium tetrachloride.[2]


Polonium tetrachloride is either monoclinic or triclinic.[1]


Polonium tetrachloride is bright yellow at room temperature. At its melting point (300 °C), it becomes straw yellow, and at its boiling point (390 °C), it becomes scarlet. Its vapours are purple-brown until 500 °C, when they turn blue-green.[1][2]


Polonium tetrachloride may be prepared by:


Polonium tetrachloride forms a complex with two moles of tributyl phosphate.[1]

Like selenium tetrachloride and tellurium tetrachloride, polonium tetrachloride forms PoCl
and PoCl2−
halogen complexes.[2]


  1. ^ a b c d e f g h i j k l m "Polonium Tetrachloride". DrugLead. US FDA&EMEA. 2009. Retrieved 12 June 2012. 
  2. ^ a b c d e f g Holleman, A. F.; Wiberg, E. (2001), Inorganic Chemistry, San Diego: Academic Press, p. 594, ISBN 0-12-352651-5