Vanadium(II) chloride
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.[1]
Solid VCl2 is prepared by thermal decomposition of VCl3, which leaves a residue of VCl2:[1]
- 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.[2]
Vanadium dichloride is used as a specialty reductant in organic chemistry. As an aqueous solution, it converts cyclohexylnitrate to cyclohexanone. It reduces phenyl azide into aniline.[3]
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).[4]
References
Template:Vanadium compounds Template:Chlorides
- ↑ a b Young, R. C.; Smith, M. E. "Vanadium(II) Chloride" Inorganic Syntheses, 1953, volume IV, page 126-127.Script error: No such module "doi".
- ↑ Martin Pomerantz, Gerald L. Combs, N. L. Dassanayake, "Vanadium Dichloride Solution" Inorganic Syntheses, 1982, vol. XXI, pp. 185–187. Script error: No such module "doi".
- ↑ Script error: No such module "citation/CS1".
- ↑ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. Template:ISBN.