Iridium(IV) fluoride

Iridium(IV) fluoride
Other names

Iridium tetrafluoride
Identifiers
CAS number 37501-24-9
Properties
Molecular 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
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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. ^ a b c Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0080379419. 
  2. ^ Paine, Robert T.; Asprey, Larned B. (1975). "Reductive syntheses of transition metal fluoride compounds. Synthesis of rhenium, osmium, and iridium pentafluorides and tetrafluorides". Robert T. Paine, Larned B. Asprey 14 (5): 1111–1113. doi:10.1021/ic50147a030. 
  3. ^ a b Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6