Molybdenum(V) fluoride

Molybdenum(V) fluoride is an inorganic compound with the formula MoF5. It is a hygroscopic yellow solid. Like most pentafluorides, it exists as a tetramer.[1]

Molybdenum(V) fluoride
IUPAC names
Molybdenum(V) fluoride
Molybdenum pentafluoride
3D model (JSmol)
Molar mass 190.94 g·mol−1
Appearance yellow solid
Density 3.44 g/cm3
Melting point 66 °C (151 °F; 339 K)
Boiling point 215.6 °C (420.1 °F; 488.8 K)
96.6 J/mol·K
Main hazards oxidizer, hydrolyzes to release HF
Flash point Non-flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references


Molybdenum(V) fluoride is produced by the reaction of molybdenum and molybdenum hexafluoride:[2]

Mo + 5 MoF6 → 6 MoF5

About 120 °C, it disproportionates to the tetra- and hexafluoride:

2 MoF5 → MoF4 + MoF6


  1. Edwards, A. J. (1969). "Crystal Structure of tungsten pentafluoride". J. Chem. Soc. A: 909. doi:10.1039/J19690000909.
  2. T. J. Ouellette, C. T. Ratcliffe, D. W. A. Sharp, A. M. Steven (1972). "Molybdenum(V) Fluoride (Molybdenum pentalfluoride)". Inorganic Syntheses. 13: 146–150. doi:10.1002/9780470132449.ch28.CS1 maint: multiple names: authors list (link)

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