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.
Production Molybdenum(V) fluoride is produced by the reaction of molybdenum and molybdenum hexafluoride:
Mo + 5 MoF6 → 6 MoF5 It can also be prepared by the reduction of molybdenum hexafluoride with phosphorus trifluoride or tungsten hexacarbonyl, or by the oxidation of elemental molybdenum with fluorine at 900 °C. About 165 °C, it disproportionates to the tetra- and hexafluoride:
2 MoF5 → MoF4 + MoF6
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