Vanadium(II) oxide

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Vanadium(II) oxide
Vanadium(II)-oxide-3D-vdW.png
Names
IUPAC name
Vanadium(II) oxide
Other names
Vanadium oxide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.031.655 Edit this at Wikidata
  • [V+2].[O-2]
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)
1.5763
Structure
Halite (cubic), cF8
Fm3m, No. 225
Octahedral (V2+)
Octahedral (O2−)
Thermochemistry
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
Other anions

Other cations
 Niobium(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 [77 °F], 100 kPa).
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Infobox references

Vanadium(II) oxide, VO, is one of the many oxides of vanadium. VO is a long-lived, electronically neutral reagent chemical. It adopts a distorted NaCl structure and contains weak V−V metal to metal bonds. As shown by band theory, VO is a conductor of electricity due to its partially filled conduction band and delocalisation of electrons in the t2g orbitals. VO is a non-stoichiometric compound, its composition varying from VO0.8 to VO1.3.[2] Gaseous VO is one of the molecules found in the spectrum of relatively cool M-type stars.[3]

References[]

  1. ^ a b c 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.


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