Vanadium(II) chloride

Vanadium(II) chloride

Plan view of a single layer in the crystal structure of vanadium(II) chloride Layer stacking in the crystal structure of vanadium(II) chloride
Names
IUPAC name Vanadium(II) chloride
Other names Vanadous chloride
Identifiers
CAS Number	10580-52-6 N
ChemSpider	59733 Y
Jmol 3D model	Interactive image
PubChem	66355
RTECS number	YW1575000
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
Vapor pressure	{{{value}}}
Related compounds
Other anions	vanadium(II) fluoride, vanadium(II) bromide, vanadium(II) iodide
Other cations	titanium(II) chloride, chromium(II) chloride
Related compounds	vanadium(III) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Vanadium(II) chloride is the inorganic compound with the formula VCl₂, and is the most reduced vanadium chloride. Vanadium(II) chloride is an apple-green solid that dissolves in water to give purple solutions.

Preparation, properties, and related compounds

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

2 VCl₃ → VCl₂ + VCl₄

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

Structure

Solid VCl₂ adopts the cadmium iodide structure, featuring octahedral coordination geometry. 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 convert sulfoxides to sulfides, organic azides to amines, as well as reductively coupling some alkyl halides.