Tungsten pentafluoride

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]

Tungsten(V) fluoride
Names
IUPAC names
Tungsten(V) fluoride
Tungsten pentafluoride
Identifiers
3D model (JSmol)
ChemSpider
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
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).
Infobox references

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

References

  1. Edwards, A. J. (1969). "Crystal Structure of tungsten pentafluoride". J. Chem. Soc. A: 909. doi:10.1039/J19690000909.
  2. Schröder, Johann; Grewe, Franz J. (1970). "Darstellung und Eigenschaften von Wolframpentafluorid". Chemische Berichte. 103 (5): 1536-46. doi:10.1002/cber.19701030524.CS1 maint: multiple names: authors list (link)
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