Synthesis and characterisation of some iridium-carbonyl-fluoride complexes. Crystal structures of [IrF(CO){P(C6H4-2-CH3)3}2] and [IrF2(COD)py2][BF4]

Abstract

Two routes to iridium(III) fluorocomplexes are described. The direct reaction of tetrairidium dodecacarbonyl with elemental fluorine in aHF offers a clean, convenient, large scale route to [IrF₃(CO)₃]; addition of phosphines to [IrF₃(CO)₃] in THF affords mer-[IrF₃(CO)L₂] or [IrF(CO)L₂]. Alternatively, cationic [IrF₂(COD)L₂]⁺ and [IrF₂(CO)₂L₂]⁺ (L = phosphine, pyridine; L₂ = α-diimine) are accessible via the oxidation of the iridium(I) precursors with xenon difluoride.