Molar mass 350.79 g/mol | Boiling point 390 °C | |
Appearance Bright yellow crystalline solid |
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. Above 200 °C, it tends to decompose into polonium dichloride and excess chlorine, similar to selenium tetrachloride and tellurium tetrachloride.
Contents
Structure
Polonium tetrachloride is either monoclinic or triclinic.
Appearance
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.
Preparation
Polonium tetrachloride may be prepared by:
Chemistry
Polonium tetrachloride forms a complex with two moles of tributyl phosphate.
Like selenium tetrachloride and tellurium tetrachloride, polonium tetrachloride forms PoCl−
5 and PoCl2−
6 halogen complexes.