French
DeutschMolybdenum(V) fluoride
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| Names | |
|---|---|
| IUPAC names Molybdenum(V) fluoride Molybdenum pentafluoride | |
| Identifiers | |
3D model (JSmol) | |
PubChem CID | |
CompTox Dashboard (EPA) | |
| |
| |
| Properties | |
| F5Mo | |
| Molar mass | 190.94 g·mol−1 |
| Appearance | yellow solid |
| Density | 3.44 g/cm3 |
| Melting point | 45.7 °C (114.3 °F; 318.8 K)[1] |
| Boiling point | 50 °C (122 °F; 323 K)[1] (sublimes) |
| Thermochemistry | |
Heat capacity (C) | 96.6 J/mol·K |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
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). | |
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.[2]
Production
[edit]Molybdenum(V) fluoride is produced by the reaction of molybdenum and molybdenum hexafluoride:[3]
- 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.[3]
About 165 °C, it disproportionates to the tetra- and hexafluoride:[1]
- 2 MoF5 → MoF4 + MoF6
References
[edit]- ^ a b c Stene, Riane E.; Scheibe, Benjamin; Pietzonka, Clemens; Karttunen, Antti J.; Petry, Winfried; Kraus, Florian (2018). "MoF5 revisited. A comprehensive study of MoF5". Journal of Fluorine Chemistry. 211: 171–179. doi:10.1016/j.jfluchem.2018.05.002. ISSN 0022-1139. S2CID 103463040.
- ^ Edwards, A. J. (1969). "Crystal Structure of tungsten pentafluoride". J. Chem. Soc. A: 909. doi:10.1039/J19690000909.
- ^ a b T. J. Ouellette, C. T. Ratcliffe, D. W. A. Sharp, A. M. Steven (1972). "Molybdenum(V) Fluoride (Molybdenum Pentafluoride)". Molybdenum(V) Fluoride (Molybdenum pentalfluoride). Inorganic Syntheses. Vol. 13. pp. 146–150. doi:10.1002/9780470132449.ch28. ISBN 9780470132449.
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