-oxide-3D-vdW.png) | |
| Names | |
|---|---|
| IUPAC name Vanadium(II) oxide | |
| Other names Vanadium oxide | |
| Identifiers | |
3D model (JSmol) | |
| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.031.655 |
| EC Number |
|
| 532274 | |
| |
| |
| Properties | |
| VO | |
| Molar mass | 66.9409 g/mol |
| Appearance | grey solid with metallic lustre |
| Density | 5.758 g/cm3 |
| Melting point | 1,789 °C (3,252 °F; 2,062 K) |
| Boiling point | 2,627 °C (4,761 °F; 2,900 K) |
Refractive index (nD) | 1.5763 |
| Structure | |
| Halite (cubic),cF8 | |
| Fm3m, No. 225 | |
| Octahedral (V2+) Octahedral (O2−) | |
| Thermochemistry | |
Std molar entropy(S⦵298) | 39.01 J/mol·K[1] |
Std enthalpy of formation(ΔfH⦵298) | −431.790 kJ/mol[1] |
Gibbs free energy(ΔfG⦵) | −404.219 kJ/mol[1] |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
Otheranions | Vanadium monosulfide Vanadium monoselenide Vanadium monotelluride |
Othercations | Niobium(II) oxide Tantalum(II) oxide |
| Vanadium(III) oxide Vanadium(IV) oxide Vanadium(V) oxide | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Vanadium(II) oxide is theinorganic compound with the idealized formula VO. It is one of the several binaryvanadium oxides. It adopts a distortedNaCl structure and contains weak V−V metal to metal bonds. VO is asemiconductor owing to delocalisation of electrons in the t2g orbitals. VO is anon-stoichiometric compound, its composition varying from VO0.8 to VO1.3.[2]
Diatomic VO is one of the molecules found in the spectrum of relatively cool M-type stars.[3] A potential use of vanadium(II) monoxide is as a molecular vapor insynthetic chemicalreagents in low-temperature matrices.[4]
