Iridium tetrafluoride

Iridium tetrafluoride

Names
Other names Iridium tetrafluoride
Identifiers
CAS Number	37501-24-9
Properties
Chemical formula	IrF4
Molar mass	268.2109 g/mol
Appearance	dark brown solid
Related compounds
Other anions	iridium dioxide
Other cations	sodium fluoride, potassium fluoride, caesium fluoride, calcium fluoride
Related compounds	iridium(V) fluoride
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

Iridium(IV) fluoride is a chemical compound of iridium and fluorine, with the chemical formula IrF₄ and is a dark brown solid.^[1] Early reports of IrF₄ prior to 1965 are questionable and appear to describe the compound IrF₅.^[1] The solid can be prepared by reduction of IrF₅ with iridium black^[1] or reduction with H₂ in aqueous HF^[2] The crystal structure of the solid is notable as it was the first example of a three-dimensional lattice structure found for a metal tetrafluoride and subsequently RhF₄, PdF₄ and PtF₄ have been found to have the same structure.^[3] The structure has 6 coordinate, octahedral, iridium where two edges of the octahedra are shared and the two unshared fluorine atoms are cis to one another.^[3]

References

1. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.
2. Paine, Robert T.; Asprey, Larned B. (1975). "Reductive syntheses of transition metal fluoride compounds. Synthesis of rhenium, osmium, and iridium pentafluorides and tetrafluorides". Inorg. Chem. 14 (5): 1111–1113. doi:10.1021/ic50147a030.
3. Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6