Tungsten pentafluoride
Chemical compound
From Wikipedia, the free encyclopedia
Tungsten(V) fluoride is an inorganic compound with the formula WF5. It is a hygroscopic yellow solid. Like most pentafluorides, it adopts a tetrameric structure, consisting of [WF5]4 molecules. In this way, each W center achieves octahedral coordination.[1]
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| Names | |
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| IUPAC names
Tungsten(V) fluoride Tungsten pentafluoride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| F5W | |
| Molar mass | 278.83 g·mol−1 |
| Appearance | yellow solid |
| Density | 5.01 g/cm3 |
| Melting point | 66 °C (151 °F; 339 K) |
| Boiling point | 215.6 °C (420.1 °F; 488.8 K) |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
oxidizer, hydrolyzes to release HF |
| Flash point | Non-flammable |
| Related compounds | |
Related compounds |
TaCl5 NbCl5 MoF5 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Production
Tungsten(V) fluoride is produced by the reaction of tungsten and tungsten hexafluoride:[2]
- W + 5 WF6 → 6 WF5
At room temperature, it disproportionates to the tetra- and hexafluoride:
- 2 WF5 → WF4 + WF6
