Iridium(IV) fluoride
Encyclopedia
Iridium fluoride is a chemical compound of iridium
and fluorine
, with the chemical formula IrF4 and is a dark brown solid. Early reports of IrF4 prior to 1965 are questionable and appear to describe the compound IrF5
. The solid can be prepared by reduction of IrF5 with iridium black or reduction with H2 in aqueous HF 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. 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.
Iridium
Iridium is the chemical element with atomic number 77, and is represented by the symbol Ir. A very hard, brittle, silvery-white transition metal of the platinum family, iridium is the second-densest element and is the most corrosion-resistant metal, even at temperatures as high as 2000 °C...
and fluorine
Fluorine
Fluorine is the chemical element with atomic number 9, represented by the symbol F. It is the lightest element of the halogen column of the periodic table and has a single stable isotope, fluorine-19. At standard pressure and temperature, fluorine is a pale yellow gas composed of diatomic...
, with the chemical formula IrF4 and is a dark brown solid. Early reports of IrF4 prior to 1965 are questionable and appear to describe the compound IrF5
Iridium(V) fluoride
Iridium fluoride, IrF5, is a chemical compound of iridium and fluorine, first described by Neil Bartlett in 1965. A highly reactive yellow low melting solid, it has a tetrameric structure, Ir4F20, which contains octahedrally coordinated iridium atoms. This structure is shared with RuF5 and OsF5...
. The solid can be prepared by reduction of IrF5 with iridium black or reduction with H2 in aqueous HF 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. 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.