Polonium tetrachloride
| Names | |
|---|---|
| Systematic IUPAC name Polonium tetrachloride | |
| Identifiers | |
CAS Number |
|
3D model (JSmol) |
|
| ChemSpider |
|
PubChem CID |
|
| UNII |
|
CompTox Dashboard (EPA) |
|
InChI
| |
| |
| Properties | |
Chemical formula | PoCl4 |
| Molar mass | 350.79 g/mol |
| Appearance | Bright yellow crystalline solid[1] |
| Melting point | ≈ 300 °C (in chlorine)[1] |
| Boiling point | 390 °C (734 °F; 663 K) |
Solubility in water | soluble,[vague] but rather slow hydrolysis |
| Solubility | very soluble in hydrochloric acid and thionyl chloride, moderately soluble in ethanol and acetone, decomposes in dilute nitric acid |
| Related compounds | |
Other anions | Polonium tetrafluoride Polonium tetrabromide Polonium tetraiodide |
Other cations | Selenium tetrachloride Tellurium tetrachloride |
Related compounds | Polonium dichloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references | |
Chemical compound
Polonium tetrachloride (also known as polonium(IV) chloride) is a chemical compound with the formula PoCl4. The salt 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.[1]
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.[1]
Preparation
Polonium tetrachloride may be prepared by:
- halogenation of polonium dioxide with dry hydrogen chloride, gaseous thionyl chloride, or phosphorus pentachloride;[1]
- dissolving of polonium metal in hydrochloric acid;
- heating polonium dioxide to 200 °C in carbon tetrachloride vapour;
- reaction of polonium metal with dry chlorine gas in 200 °C.
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.[1]
References
- ^ a b c d e f Holleman, Arnold Frederik; Wiberg, Egon (2001), Wiberg, Nils (ed.), Inorganic Chemistry, translated by Eagleson, Mary; Brewer, William, San Diego/Berlin: Academic Press/De Gruyter, p. 594, ISBN 0-12-352651-5
- v
- t
- e
- PoF4
- PoCl4
- PoBr4
- PoI4
- PoCl2Br2
- PoO2
- PoO(OH)2
- Po(SO4)2
- Po(SeO4)2
- Po(NO3)4
- Po(CO3)2
- Po3(PO4)4
- Po(CrO4)2
- Po(IO3)4
- H2PoBr6
- Cs2PoCl6
- Cs2PoBr6
- Cs2PoI6
- H2PoO3
- K2PoO3
- Po(C2O4)2
- Po(CH3CO2)4
- Po(CN)4
- PoF6
- PoO3
