Vanadium(II) chloride

Summary

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.[2]

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
  • 10580-52-6 checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 59733 checkY
ECHA InfoCard 100.031.057 Edit this at Wikidata
EC Number
  • 234-176-7
  • 66355
RTECS number
  • YW1575000
  • DTXSID60147349 Edit this at Wikidata
  • InChI=1S/2ClH.V/h2*1H;/q;;+2/p-2 checkY
    Key: ITAKKORXEUJTBC-UHFFFAOYSA-L checkY
  • InChI=1/2ClH.V/h2*1H;/q;;+2/p-2
    Key: ITAKKORXEUJTBC-NUQVWONBAZ
  • Cl[V]Cl
Properties
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)
soluble
+2410.0·10−6 cm3/mol
Structure
CdI2
octahedral
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Reacts with oxygen rapidly
GHS labelling:[1]
GHS05: CorrosiveGHS07: Exclamation mark
Danger
H302, H314
P260, P264, P270, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P330, P363, P405
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).
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Infobox references

Preparation, properties, and related compoundsEdit

Solid VCl2 is prepared by thermal decomposition of VCl3, which leaves a residue of VCl2:[2]

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.[3]

StructureEdit

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).[4]

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.

ReferencesEdit

  1. ^ "Vanadium dichloride". pubchem.ncbi.nlm.nih.gov. Retrieved 12 December 2021.
  2. ^ a b Young, R. C.; Smith, M. E. "Vanadium(II) Chloride" Inorganic Syntheses, 1953, volume IV, page 126-127.doi:10.1002/9780470132357.ch42
  3. ^ Martin Pomerantz, Gerald L. Combs, N. L. Dassanayake, "Vanadium Dichloride Solution" Inorganic Syntheses, 1982, vol. XXI, pp. 185–187. doi:10.1002/9780470132524.ch42
  4. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.