Vanadium(II) chloride

Vanadium(II) chloride

Names
IUPAC name Vanadium(II) chloride
Other names Vanadous chloride
Identifiers
CAS Number	10580-52-6
3D model (JSmol)	Interactive image
ChemSpider	59733 Y
ECHA InfoCard	100.031.057
PubChem CID	66355
RTECS number	YW1575000
CompTox Dashboard (EPA)	DTXSID60147349
InChI InChI=1S/2ClH.V/h2*1H;/q;;+2/p-2 Y Key: ITAKKORXEUJTBC-UHFFFAOYSA-L Y InChI=1/2ClH.V/h2*1H;/q;;+2/p-2 Key: ITAKKORXEUJTBC-NUQVWONBAZ
SMILES Cl[V]Cl
Properties
Chemical formula	VCl2
Molar mass	121.847 g/mol
Appearance	pale green solid
Density	3.230 g/cm3
Melting point	1,027 °C (1,881 °F; 1,300 K)
Boiling point	1,506 °C (2,743 °F; 1,779 K)
Solubility in water	soluble
Structure
Crystal structure	CdI2
Coordination geometry	octahedral
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Reacts with oxygen rapidly
Related compounds
Other anions	vanadium(II) fluoride, vanadium dibromide
Other cations	titanium dichloride, chromium(II) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Vanadium(II) chloride is the inorganic compound with the formula VCl₂. This purple solid is the most reduced vanadium chloride. Like other metal dihalides, it is a polymer. Vanadium(II) chloride dissolves in water to give purple solutions.

Preparation, properties, and related compounds

It is prepared by thermal decomposition of VCl₃, which leaves a residue of VCl₂:

2 VCl₃ → VCl₂ + VCl₄

VBr₂ and VI₂ are structurally and chemically similar to the dichloride. All have the d³ configuration, with a quartet ground state, akin to Cr(III).

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. VCl₂ dissolves in water to give the hexaaquo ion [V(H₂O)₆]²⁺. Evaporation of such solutions produces crystals of [V(H₂O)₆]Cl₂.