Vanadium(III) fluoride

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Vanadium(III) fluoride
Image:Vanadium(III) fluoride.jpg
Other names vanadium trifluoride
Identifiers
CAS number [10049-12-4]
Properties
Molecular formula VF3
Molar mass 107.94 g/mol
Appearance gray-green powder
Density 3.363 g/cm³, solid
Melting point

1406 °C
Solubility in water insoluble
Hazards
EU classification not listed
NFPA 704
0
3
2
 
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Vanadium(III) fluoride is the chemical compound with the formula VF3. This gray-green, refractory solid is obtained in a two-step procedure from V2O3.[1] The first step entails conversion to the hexafluorovanadate(III) salt using ammonium bifluoride:

V2O3 + 6 (NH4)HF2 → 2 (NH4)3VF6 + 3 H2O

In the second step, the hexafluorovanadate is thermally decomposed.

(NH4)3VF6 → 3 NH3 + 3 HF + VF3

The thermal decomposition of ammonium salts is a relatively common method for the preparation of inorganic solids.

VF3 can also be prepared by treatment of V2O3 with HF. VF3 is a crystalline solid with 6 coordinate vanadium atoms with bridging fluorine atoms. The magnetic moment indicates the presence of 2 unpaired elecrons.

[edit] Synonyms

  • vanadium fluoride
  • vanadium (III) fluoride
  • vanadium trifluoride

[edit] See also

  • VH: vanadium(I) hydride
  • V2H: vanadium hydride

Fluorides

  • VF2: vanadium(II) fluoride
  • VF3: vanadium(III) fluoride
  • VF4: vanadium(IV) fluoride
  • VF5: vanadium(V) fluoride

Chlorides

Bromides

Iodides

  • VI2: vanadium(II) iodide
  • VI3: vanadium(III) iodide
  • VI4: vanadium(IV) iodide

Oxides

Sulfides

  • VS2: vanadium(IV) sulfide
  • V2S3: vanadium(III) sulfide

Selenides

  • VSe2: vanadium(IV) selenide

Tellurides

  • VTe2: vanadium(IV) telluride

Nitrides

Carbonyls

  • V(CO)6: vanadium(O) carbonyl

[edit] References

Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements, 2nd Edition, Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4. 

  1. ^ Sturm, B. J.; Sheridan, C. W. "Vanadium(III) Fluoride" Inorganic Syntheses 1963; Vol. 7, pages 52-54. ISBN 0-88275-165-4.
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