Molybdenum oxytetrafluoride

Molybdenum oxytetrafluoride
Identifiers
CAS Number	14459-59-7;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:30716;
Gmelin Reference	101090, 555842
	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	F4MoO
Molar mass	187.94 g·mol−1
Appearance	white solid
Density	3.3 g/cm3
	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 MoOF₄. 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 → MoOF₄(NCCH₃) + 2 (CH₃)₃SiF

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

References

^ 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.
^ 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.
^ 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. doi:10.1016/j.jfluchem.2017.06.015. hdl:2381/40278.

[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.

[IC-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. doi:10.1016/j.jfluchem.2017.06.015. hdl:2381/40278.

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