Tungsten pentafluoride

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Tungsten(V) fluoride
Tungsten(V) fluoride
Names
IUPAC names
Tungsten(V) fluoride
Tungsten pentafluoride
Identifiers
3D model (
JSmol
)
ChemSpider
  • InChI=1S/5FH.W/h5*1H;/q;;;;;+5/p-5
    Key: QHIRVZBLPRTQQO-UHFFFAOYSA-I
  • F[W](F)(F)(F)F
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
MoF5
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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]

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. doi:10.1039/J19690000909
    .
  2. doi:10.1002/cber.19701030524.{{cite journal}}: CS1 maint: multiple names: authors list (link
    )


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