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

| MeltingPt_ref =

| BoilingPtC = 50

| BoilingPt_notes=(sublimes)

| BoilingPt_ref =

}}

|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:Fluorides

Category:Molybdenum halides

Category:Molybdenum(V) compounds

{{Inorganic-compound-stub}}