Vanadium(II) fluoride
Names
Other names
Vanadium(II) fluoride
Identifiers
3D model (JSmol)
  • InChI=1S/2FH.V/h2*1H;/q;;+2/p-2
    Key: XHZLWOBYMWIKHM-UHFFFAOYSA-L
  • [F-].[F-].[V+2]
Properties
F2V
Molar mass 88.9383 g·mol−1
Appearance blue crystals

[1]

soluble in water, forms [V(H2O)6]2+[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Vanadium(II) fluoride is a fluoride of vanadium, with the chemical formula of VF2. It forms blue crystals.

Preparation

Vanadium(II) fluoride can be produced by the reduction of vanadium trifluoride by hydrogen in a hydrogen fluoride atmosphere at 1150 °C:[3]

2 VF3 + H2 → 2 VF2 + 2 HF

Properties

Physical properties

Vanadium(II) fluoride crystallizes in the tetragonal crystal system with space group P42/mnm (No. 136). Its lattice constants are a = 480.4 pm and c = 323.7 pm.[4]

Reactions

Vanadium(II) fluoride is a strong reducing agent that can reduce nitrogen to hydrazine in the presence of magnesium hydroxide.[2]

It dissolves in water to form [V(H2O)6]2+ ions.[2]

V2+ + 6 H2O → [V(H2O)6]2+

References

  1. ↑ "WebElements Periodic Table » Vanadium » vanadium difluoride". www.webelements.com. Retrieved 2023-09-16.
  2. 1 2 3 Holleman, Arnold Frederik; Wiberg, Egon (2001), Wiberg, Nils (ed.), Inorganic Chemistry, translated by Eagleson, Mary; Brewer, William, San Diego/Berlin: Academic Press/De Gruyter, p. 1550, ISBN 0-12-352651-5
  3. ↑ Lothar Kolditz: Anorganische Chemie Teil 2. VEB Deutscher Verlag der Wissenschaften, Berlin, 1980, S. 641.
  4. ↑ J. W. Stout, W. O. J. Boo: Crystalline vanadium (II) fluoride, VF2. Preparation, structure, heat capacity from 5 to 300 K and magnetic ordering. In: The Journal of Chemical Physics. 71, 1, 1979, S. 1–8, doi:10.1063/1.438115.
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