Hydrogen polonide
 |
|
| Names | |
|---|---|
|
Preferred IUPAC name
Polonium hydride
|
|
|
Systematic IUPAC name
Polane
|
|
| Identifiers | |
| ChEBI | |
| ChemSpider | |
| 25163, 169602 | |
|
PubChem CID
|
|
| Properties | |
| PoH2 | |
| Molar mass | 210.998 g/mol |
| Melting point | −35.3 °C (−31.5 °F; 237.8 K) |
| Boiling point | 36.1 °C (97.0 °F; 309.2 K) |
| Related compounds | |
|
Other anions
|
H2O H2S H2Se H2Te |
|
Other cations
|
TlH3 PbH4 BiH3 HAt |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
|
| Infobox references | |
Polonium hydride (also known as polonium dihydride, hydrogen polonide, or polane) is a chemical compound with the formula PoH2. It is a liquid at room temperature, the second hydrogen chalcogenide with this property after water. It is very unstable chemically and tends to decompose into elemental polonium and hydrogen; like all polonium compounds, it is highly radioactive. It is a volatile and very labile compound, from which many polonides can be derived.
Polonium hydride cannot be produced by direct reaction from the elements upon heating. Other unsuccessful routes to synthesis include the reaction of polonium tetrachloride (PoCl4) with lithium aluminium hydride (LiAlH4), which only produces elemental polonium, and the reaction of hydrochloric acid with magnesium polonide (MgPo). The fact that these synthesis routes do not work may be caused by the radiolysis of polonium hydride upon formation.
Trace quantities of polonium hydride may be prepared by reacting hydrochloric acid with polonium-plated magnesium foil. In addition, the diffusion of trace quantities of polonium in palladium or platinum that is saturated with hydrogen (see palladium hydride) may be due to the formation and migration of polonium hydride.
Experiments conducted on the trace scale show indications that the reaction between polonium metal and nascent hydrogen may produce polonium hydride.
...
Wikipedia