Vanadium(II) fluoride

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Vanadium(II) fluoride
Rutile structure.png
Names
Other names
Vanadium(II) fluoride
Identifiers
3D model (JSmol)
PubChem CID
  • 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
Appearancedeep blue crystals [1]
Density 3.954 g/cm3 [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).

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

Contents

Structure

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. [1]

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

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. 1 2 3 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.
  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.
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