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Vanadium(II) chloride



Vanadium(II) chloride
IUPAC name Vanadium(II) chloride
Other names Vanadous chloride
Identifiers
CAS number 10580-52-6
RTECS number YW1575000
Properties
Molecular formula VCl2
Molar mass 121.85 g/mol
Appearance pale green solid
Density 3.230 g/cm3, solid
Melting point

1350 °C (? K)

Solubility in water soluble
Structure
Crystal structure CdI2
Coordination
geometry
octahedral
Hazards
Main hazards Reacts with oxygen rapidly
R-phrases 20/21/22-34
S-phrases 26-27-36/37/39-45
Related Compounds
Other anions VCl3
VCl4
Other cations MnCl2
CrCl2
TiCl3
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Vanadium(II) chloride is VCl2. It is the most reduced vanadium chloride known. The species has the d3 configuration, with a quartet ground state, akin to Cr(III).

Additional recommended knowledge

This salt-like solid has a polymeric structure. The other dihalides are also known, and VBr2 and VI2 are structurally and chemically similar to the dichloride. It is prepared by thermal decomposition of VCl3 to volatile VCl4, leaving a residue of VCl2.

Vanadium dichloride is a powerful reducing species, being able to reduce sulfoxides to sulfides, organic azides to amines, as well as reductively coupling some alkyl halides. Some derivatives have been shown to reduce nitrogen to hydrazine and ammonia.

VCl2 dissolves in water to give the ion [V(H2O)6]2+; evaporation of such solutions produced crystals of [V(H2O)6]Cl2 can be obtained.

References

    • Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
    • Young, R. C.; Smith, M. E. "Vanadium(II) Chloride" Inorganic Syntheses volume IV, page 126-127, 1953.
     
    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Vanadium(II)_chloride". A list of authors is available in Wikipedia.
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