Molybdenum(V) fluoride
{{chembox
| verifiedrevid = 428807101
| Name = Molybdenum(V) fluoride
| ImageFile = MoF5.png
| ImageSize =
| ImageName = Molybdenum(V) fluoride
| IUPACName = Molybdenum(V) fluoride
Molybdenum pentafluoride
| OtherNames =
|Section1={{Chembox Identifiers
| CASNo = 13819-84-6
| CASNo_Ref = {{cascite|correct|CAS}}
| ChEBI = 30711
| ChemSpiderID = 123127
| Gmelin = 2499
| PubChem = 139613
| InChI = 1S/5FH.Mo/h5*1H;/q;;;;;+5/p-5
| InChIKey = NBJFDNVXVFBQDX-UHFFFAOYSA-I
| SMILES = F[Mo](F)(F)(F)F
}}
|Section2={{Chembox Properties
| Mo=1|F=5
| MolarMass =
| Appearance = yellow solid
| Density = 3.44 g/cm3
| Solubility =
| SolubleOther =
| MeltingPtC = 45.7
| BoilingPtC = 50
| BoilingPt_notes=(sublimes)
}}
|Section3={{Chembox Structure
| Coordination =
| CrystalStruct =
| Dipole =
}}
|Section4={{Chembox Thermochemistry
| HeatCapacity = 96.6 J/mol·K
}}
|Section7={{Chembox Hazards
| ExternalSDS =
| MainHazards = oxidizer, hydrolyzes to release HF
| FlashPt = Non-flammable
}}
}}
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.{{cite journal|doi=10.1039/J19690000909|title=Crystal Structure of tungsten pentafluoride|journal=J. Chem. Soc. A|pages=909|year=1969|last1=Edwards|first1=A. J.}}
Production
Molybdenum(V) fluoride is produced by the reaction of molybdenum and molybdenum hexafluoride:{{cite book| author=T. J. Ouellette, C. T. Ratcliffe, D. W. A. Sharp, A. M. Steven| title=Molybdenum(V) Fluoride (Molybdenum pentalfluoride)| chapter=Molybdenum(V) Fluoride (Molybdenum Pentafluoride)| series=Inorganic Syntheses| volume=13| year=1972| pages=146–150|doi=10.1002/9780470132449.ch28| isbn=9780470132449}}
: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:{{cite journal|last1=Stene|first1=Riane E.|last2=Scheibe|first2=Benjamin|last3=Pietzonka|first3=Clemens|last4=Karttunen|first4=Antti J.|last5=Petry|first5=Winfried|last6=Kraus|first6=Florian|title=MoF5 revisited. A comprehensive study of MoF5|journal=Journal of Fluorine Chemistry|volume=211|year=2018|pages=171–179|issn=0022-1139|doi=10.1016/j.jfluchem.2018.05.002|s2cid=103463040 |url=https://aaltodoc.aalto.fi/handle/123456789/31920 |url-access=subscription}}
:2 MoF5 → MoF4 + MoF6
References
{{Molybdenum compounds}}
{{Fluorine compounds}}
Category:Molybdenum(V) compounds
{{Inorganic-compound-stub}}