Gold(V) fluoride
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| Gold(V) fluoride | |
|---|---|
| Image:Gold(V) fluoride.jpg | |
| General | |
| Systematic name | Gold(V) fluoride |
| Other names | Auric fluoride,
Gold pentafluoride, Gold fluoride |
| Molecular formula | AuF5 |
| Molar mass | 291.959 g/mol |
| Appearance | red unstable solid |
| CAS number | [57542-85-5] |
| Properties | |
| Density and phase | ? g/cm3, ? |
| Solubility in water | Decomposes |
| Melting point | 60°C (Decomposes) |
| Structure | |
| Molecular shape | ? |
| Coordination geometry |
? |
| Crystal structure | ? |
| Dipole moment | ? D |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | Corrosive, toxic |
| NFPA 704 | |
| Flash point | ?°C |
| R/S statement | R: ? S: ? |
| RTECS number | ? |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | ? |
| Other cations | AuCl3 |
| Except where noted otherwise, data are given for materials in their standard state (at 25°C, 100 kPa) Infobox disclaimer and references |
|
Gold(V) fluoride is a red solid that is very corrosive. It liberates fluorine spontaneously. It is very reactive and unstable at room temperature. It hydrolyses in water to liberate fluorine and forms a mixture of gold hydroxides and oxides.
[edit] Synthesis
Gold(V) fluoride can be synthesized by heating gold metal in an atmosphere of oxygen and fluorine to 370oC under a pressure of 8 atmospheres to form gold dioxygenyl fluoride:
2Au(s) + 2O2(g) + 6F2(g) → 2O2AuF6(s)
The complex decomposes at 180oC to produce the compound:
2O2AuF6(s) → 2AuF5(s) + 2O2(g) + F2(g)
[edit] External links
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