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Vanadium(II) oxide

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Vanadium(II) oxide
Names
IUPAC name Vanadium(II) oxide
Other names Vanadium oxide
Identifiers
CAS Number
3D model (JSmol)
ECHA InfoCard 100.031.655 Edit this at Wikidata
PubChem CID
CompTox Dashboard (EPA)
SMILES
  • .
Properties
Chemical formula VO
Molar mass 66.9409 g/mol
Appearance grey solid with metallic lustre
Density 5.758 g/cm
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
Crystal structure Halite (cubic), cF8
Space group Fm3m, No. 225
Coordination geometry Octahedral (V)
Octahedral (O)
Thermochemistry
Std molar
entropy (S298) 		39.01 J/mol·K
Std enthalpy of
formation (ΔfH298) 		-431.790 kJ/mol
Gibbs free energy (ΔfG) -404.219 kJ/mol
Hazards
Flash point Non-flammable
Related compounds
Other anions Vanadium monosulfide
Vanadium monoselenide
Vanadium monotelluride
Other cations Niobium(II) oxide
Tantalum(II) oxide
Related vanadium oxides Vanadium(III) oxide
Vanadium(IV) oxide
Vanadium(V) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Vanadium(II) oxide is the inorganic compound with the idealized formula VO. It is one of the several binary vanadium oxides. It adopts a distorted NaCl structure and contains weak V−V metal to metal bonds. VO is a semiconductor owing to delocalisation of electrons in the t2g orbitals. VO is a non-stoichiometric compound, its composition varying from VO0.8 to VO1.3.

Diatomic VO is one of the molecules found in the spectrum of relatively cool M-type stars. A potential use of vanadium(II) monoxide is as a molecular vapor in synthetic chemical reagents in low-temperature matrices.

References

  1. ^ R. Robie, B. Hemingway, and J. Fisher, “Thermodynamic Properties of Minerals and Related Substances at 298.15K and 1bar Pressure and at Higher Temperatures,” US Geol. Surv., vol. 1452, 1978.
  2. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 982. ISBN 978-0-08-037941-8.
  3. Tsuji, T. (1986). "Molecules in Stars". Annu. Rev. Astron. Astrophys. 24: 94. Bibcode:1986ARA&A..24...89T. doi:10.1146/annurev.aa.24.090186.000513.
  4. Groshens, Thomas J.; Klabunde, Kenneth J. (August 1990). "Molecular vapor synthesis: the use of titanium monoxide and vanadium monoxide vapors as reagents". Inorganic Chemistry. 29 (16): 2979–2982. doi:10.1021/ic00341a025. ISSN 0020-1669.
Vanadium compounds
Vanadium(0)
Vanadium(II)
Vanadium(III)
Organovanadium(III) compounds
  • V(C9H11)3
    • Vanadium(IV)
    Organovanadium(IV) compounds
  • VO(C5H7O2)2
    • Vanadyl(IV) compounds
    Vanadium(V)
    Vanadyl(V) compounds
    Oxides
    Mixed oxidation states
    +1 oxidation state
    +2 oxidation state
    +3 oxidation state
    +4 oxidation state
    +5 oxidation state
    +6 oxidation state
    +7 oxidation state
    +8 oxidation state
    Related
    Oxides are sorted by oxidation state. Category:Oxides


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