Vanadium(II) chloride
From Wikipedia, the free encyclopedia
| Vanadium(II) chloride | |
|---|---|
| Image:Vanadium(II) chloride.jpg | |
| 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) |
| ΔHf | -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, εr, 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) Infobox disclaimer and references |
|
Vanadium(II) chloride is VCl2. It is the most reduced vanadium chloride known. The species has the d<sup3 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.
[edit] External links
[edit] 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.
 |
This inorganic compound-related article is a stub. You can help Wikipedia by expanding it. |
