Vanadium(II) chloride

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Vanadium(II) chloride

General
Systematic name Vanadium(II) chloride
Other names Vanadous chloride
Molecular formula VCl₂
Molar mass 121.85 g/mol
Appearance pale green solid
CAS number [10580-52-6]
Properties
Density and phase 3.230 g/cm³, solid
Solubility in water soluble
Melting point 1350 °C (? K)
ΔH_f -460 kJ/mol
Structure
Coordination
geometry octahedral
Crystal structure CdI₂
Hazards
MSDS External MSDS
Main hazards Reacts with oxygen rapidly
NFPA 704
R/S statement R: 20/21/22-34
S: 26-27-36/37/39-45
RTECS number YW1575000
Supplementary data page
Structure and
properties n, ε_r, etc.
Thermodynamic
data Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Other anions VBr₂
VI₂
Other cations MnCl₂
CrCl₂
Related compounds VCl₃
VCl₄,
TiCl₃
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
[Chemical infoboxInfobox disclaimer and references]

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

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.

External links

For a full list of external links to MSDSs, spectroscopic data, commercial chemicals suppliers etc. for this compound, see [Chemical sources].

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.

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Vanadium(II) chloride

General
Systematic name	Vanadium(II) chloride
Other names	Vanadous chloride
Molecular formula	VCl₂
Molar mass	121.85 g/mol
Appearance	pale green solid
CAS number	[10580-52-6]
Properties
Density and phase	3.230 g/cm³, solid
Solubility in water	soluble
Melting point	1350 °C (? K)
ΔH_f	-460 kJ/mol
Structure
Coordination geometry	octahedral
Crystal structure	CdI₂
Hazards
MSDS	External MSDS
Main hazards	Reacts with oxygen rapidly
NFPA 704
R/S statement	R: 20/21/22-34 S: 26-27-36/37/39-45
RTECS number	YW1575000
Supplementary data page
Structure and properties	n, ε_r, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Other anions	VBr₂ VI₂
Other cations	MnCl₂ CrCl₂
Related compounds	VCl₃ VCl₄, TiCl₃
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) [Chemical infoboxInfobox disclaimer and references]