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Vanadium(II) fluoride
Names
	Other names Vanadium(II) fluoride
Identifiers
CAS Number	13842-80-3;
3D model (JSmol)	Interactive image;
PubChem CID	101602874;
	InChI InChI=1S/2FH.V/h2*1H;/q;;+2/p-2 Key: XHZLWOBYMWIKHM-UHFFFAOYSA-L;
	SMILES [F-].[F-].[V+2];
Properties
Chemical formula	F2V
Molar mass	88.9383 g·mol−1
Appearance	blue crystals
Solubility in water	soluble in water, forms [V(H2O)6]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

^ "WebElements Periodic Table » Vanadium » vanadium difluoride". www.webelements.com. Retrieved 2023-09-16.
^ ^a ^b ^c 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
^ Lothar Kolditz: Anorganische Chemie Teil 2. VEB Deutscher Verlag der Wissenschaften, Berlin, 1980, S. 641.
^ 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.

[webelements-1] "WebElements Periodic Table » Vanadium » vanadium difluoride". www.webelements.com. Retrieved 2023-09-16.

[howi-2] 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

[kolditz-3] Lothar Kolditz: Anorganische Chemie Teil 2. VEB Deutscher Verlag der Wissenschaften, Berlin, 1980, S. 641.

[kristall-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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