Vanadium(III) fluoride
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Vanadium(III) fluoride | |
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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 | |
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
- VCl2: vanadium(II) chloride
- VCl3: vanadium(III) chloride
- VCl4: vanadium(IV) chloride
Bromides
- VBr2: vanadium(II) bromide
- VBr3: vanadium(III) bromide
- VBr4: vanadium(IV) bromide
Iodides
- VI2: vanadium(II) iodide
- VI3: vanadium(III) iodide
- VI4: vanadium(IV) iodide
Oxides
- VO: vanadium(II) oxide
- VO2: vanadium(IV) oxide
- V2O3: vanadium(III) oxide
- V2O5: vanadium(V) oxide
- V3O5: vanadium oxide
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.
- ^ Sturm, B. J.; Sheridan, C. W. "Vanadium(III) Fluoride" Inorganic Syntheses 1963; Vol. 7, pages 52-54. ISBN 0-88275-165-4.