Molybdenum oxytetrafluoride

Molybdenum oxytetrafluoride

Names
IUPAC name Molybdenum(VI) tetrafluoride oxide
Identifiers
CAS Number	14459-59-7
3D model (JSmol)	Interactive image
ChEBI	CHEBI:30716
ChemSpider	10329778
Gmelin Reference	101090, 555842
PubChem CID	139764
InChI InChI=1S/4FH.Mo.O/h4*1H;;/q;;;;+4;/p-4 Key: YNQWRUOYFUZKDU-UHFFFAOYSA-J
SMILES O=[Mo](F)(F)(F)F
Properties
Chemical formula	MoOF4
Molar mass	187.94 g·mol−1
Appearance	white solid
Density	3.3 g/cm3
Related compounds
Other anions	Molybdenum oxytetrachloride
Other cations	Chromium oxytetrafluoride Tungsten oxytetrafluoride
Related compounds	Molybdenum difluoride dioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Molybdenum oxytetrafluoride is the inorganic compound with the formula Mo O F ₄. It is a white, diamagnetic solid. According to X-ray crystallography, it is a coordination polymer consisting of a linear chain of alternating Mo and F atoms. Each Mo center is octahedral, the coordination sphere being defined by oxide, three terminal fluorides, and two bridging fluorides. ^[1] In contrast to this motif, tungsten oxytetrafluoride crystallizes as a tetramer, again with bridging fluoride ligands. ^[2]

Reactions

The acetonitrile adduct of molybdenum oxytetrafluoride can be prepared by treating molybdenum hexafluoride with hexamethyldisiloxane in acetonitrile: ^[3]

MoF₆ + [(CH₃)₃Si]₂O + CH₃CN → CH₃CN·MoOF₄ + 2 (CH₃)₃SiF

Molybdenum oxytetrafluoride is susceptible to hydrolysis to give molybdenum difluoride dioxide.

References

1. Edwards, A. J.; Steventon, B. R. (1968). "Fluoride crystal structures. Part II. Molybdenum oxide tetrafluoride". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 2503. doi:10.1039/j19680002503.
2. Turnbull, Douglas; Chaudhary, Praveen; Leenstra, Dakota; Hazendonk, Paul; Wetmore, Stacey D.; Gerken, Michael (2020). "Reactions of Molybdenum and Tungsten Oxide Tetrafluoride with Sulfur(IV) Lewis Bases: Structure and Bonding in [WOF4]4, MOF4(OSO), and [SF3][M2O2F9] (M = Mo, W)". Inorganic Chemistry. 59 (23): 17544–17554. doi:10.1021/acs.inorgchem.0c02783. PMID   33200611. S2CID   226989898.
3. Levason, William; Monzittu, Francesco M.; Reid, Gillian; Zhang, Wenjian; Hope, Eric G. (2017). "Complexes of molybdenum(VI) oxide tetrafluoride and molybdenum(VI) dioxide difluoride with neutral N- and O-donor ligands". Journal of Fluorine Chemistry. 200: 190–197. Bibcode:2017JFluC.200..190L. doi: 10.1016/j.jfluchem.2017.06.015 . hdl: 2381/40278 .