Vanadium(V) oxytrifluoride

Chembox new
Name = Vanadium(V) oxytrifluoride
OtherNames = Vanadium oxyfluoride, trifluorooxovanadium
Section1 = Chembox Identifiers
CASNo = 13709-31-4
Section2 = Chembox Properties
Formula = F₃OV
MolarMass = 123.94 g/mol
Appearance = white solid
Density = 2.4590 g/cm³, solid
Solubility = insol.
MeltingPt = 300 °C
BoilingPt = 480 °C
Section7 = Chembox Hazards
EUClass = not listed
NFPA-H = 3
NFPA-F =
NFPA-R =
Section8 = Chembox Related
OtherCpds = VF₅
VOCl₃
VO₂F

Vanadium(V) oxytrifluoride is a chemical compound with the formula VOF₃. It is one of several vanadium(V) oxyhalides. Characteristic of early metal fluorides, the structure is polymeric in the solid state. The solid adopts a layered structure but upon evaporation, the species becomes dimeric. In contrast VOCl₃ and VOBr₃ remain tetrahedral in all states, being volatile liquids at room temperature. [Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.]

In organic synthesis, VOF₃ is often used for the oxidative coupling of phenolic rings, for example in the syntheses of vancomycin and its analogues. [Benoit Vanasse, Michael K. O’Brien "Vanadyl Trifluoride" in Encyclopedia of Reagents for Organic Synthesis, 2001, John Wiley & Sons, New York. DOI 10.1002/047084289X.rv005] For these applications VOF₃ is typically dissolved in trifluoroacetic acid.

References