Tungsten oxytetrafluoride

Structure

As confirmed by X-ray crystallography, crystallizes as a tetramer. The oxides are terminal, and four of the fluorides are bridging. Its structure is similar to those for niobium pentafluoride and tantalum pentafluoride. In contrast, molybdenum oxytetrafluoride adopts a polymeric structure, although again the fluorides bridge and the oxides are terminal.

In the gas state, this molecule is a monomer. It can form complexes with acetonitrile and other compounds.

Preparation

Tungsten(VI) oxytetrafluoride can be synthesized by the reaction of fluorine and tungsten trioxide.

It can also be obtained by treating tungsten with a mixture of oxygen and fluorine at high temperatures. Partial hydrolysis of tungsten hexafluoride also produces . : The reaction of tungsten(VI) oxytetrachloride and hydrogen fluoride also produces . : can also prepared by the reaction of lead(II) fluoride and tungsten trioxide at 700 °C. :

Tungsten(VI) oxytetrafluoride hydrolyzes into tungstic acid. :

References

References

1. (1995). "Handbook of inorganic compounds". CRC Press.
2. (2017). "CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data.".
3. (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.
4. (1968). "Fluoride crystal structures. Part II. Molybdenum oxide tetrafluoride". Journal of the Chemical Society A: Inorganic, Physical, Theoretical.
5. Johnson, B. F. G.. (1976). "Inorganic chemistry of the transition elements. Volume 4, A review of the literature published between October 1973 and September 1974". Chemical Society.
6. (2016). "Coordination complexes of the tungsten(VI) oxide fluorides WOF4 and WO2F2 with neutral oxygen- and nitrogen-donor ligands". Elsevier BV.
7. (1989). "Preparation, characterization, and crystal structure of the adducts WOF4.nC5H5N (n = 1, 2)". American Chemical Society (ACS).
8. Mendicino, L.. (2001). "Environmental issues with materials and processes for the electronics and semiconductor industries : proceedings of the fourth international symposium". Electrochemical Society.
9. (1999). "Tungsten : Properties, Chemistry, Technology of the Element, Alloys, and Chemical Compounds".