Molybdenum difluoride dioxide

Last updated
Molybdenum difluoride dioxide
MoO2F2monomer.svg
Names
Other names
molybdenum dioxide difluoride
Identifiers
3D model (JSmol)
  • InChI=1S/2FH.Mo.2O/h2*1H;;;/q;;+2;;/p-2
    Key: RMUNMMZEBAMTER-UHFFFAOYSA-L
  • O=[Mo](F)(F)=O
Properties
MoF2O2
Molar mass 165.94 g·mol−1
Appearancewhite solid
Density 3.82 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Molybdenum difluoride dioxide is the inorganic compound with the formula Mo F 2 O 2. It is a white, diamagnetic, volatile solid. [1]

Contents

Structure

Structure of solid MoF2O2. X positions are occupied by O or F. MoO2F2structure.svg
Structure of solid MoF2O2. X positions are occupied by O or F.

Gaseous molybdenum difluoride dioxide is a tetrahedral molecule. [2] According to X-ray crystallography, the solid is a coordination polymer consisting of trigonal primatic chains of made by linking Mo3F6O6 monomers. The fluoride and oxide positions are disordered. [3] A similar motif is adopted by titanium tetrafluoride.

Synthesis and reactions

The compound can be obtained by thermal decomposition of the sodium tetrafluorodioxomolybdate(VI) Na2[MoO2F4], which in turn is obtained from sodium molybdate: [3]

Na2MoO4 + 4 HF → Na2[MoO2F4] + 2 H2O

Heating sodium tetrafluorodioxomolybdate(VI) to 400 °C gives monomeric molybdenum difluoride dioxide, which polymerizes upon condensation:

Na2[MoO2F4] → 2 NaF + MoO2F2

The compound also arises by hydrolysis of molybdenum oxytetrafluoride:

MoOF4 + H2O → 2 HF + MoO2F2

The compound dissolves in dimethylformamide to give a adduct molybdenum difluoride dioxide bis(dimethylformamide): [4]

MoO2F2 + 2 HC(=O)−N(CH3)2 → MoO2F2(HC(=O)−N(CH3)2)2

Further reading

References

  1. ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1023. ISBN   978-0-08-037941-8.
  2. ↑ Ward, Brian G.; Stafford, Fred E. (1968). "Synthesis and Structure of Four- and Five-Coordinated Gaseous Oxohalides of Molybdenum(VI) and Tungsten(VI)". Inorganic Chemistry. 7 (12): 2569–2573. doi:10.1021/ic50070a020.
  3. 1 2 Shorafa, Hashem; Ficicioglu, Halil; Tamadon, Farhad; Girgsdies, Frank; Seppelt, Konrad (2010). "Molybdenum Difluoride Dioxide, MoO2F2". Inorganic Chemistry. 49 (9): 4263–4267. doi:10.1021/ic1000864. PMID   20380384.
  4. ↑ Benjamin, Sophie L.; Levason, William; Reid, Gillian (2013). "Medium and high oxidation state metal/Non-metal fluoride and oxide–fluoride complexes with neutral donor ligands". Chem. Soc. Rev. 42 (4): 1460–1499. doi:10.1039/C2CS35263J. PMID   23014811.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.