Syntheses of diiridium complexes with two bridging tetrachalcogenide ligands [{Ir(η5-C5Me5)}2(μ-E4)2] (E = Se or S) and their reactions with alkynes forming mono- or di-nuclear dichalcogenolene complexes
Abstract
Treatment of [ClCp*Ir(μ-Cl)2IrCp*Cl] 1 (Cp* = η5-C5Me5) with 2 equivalents of Li2Se4 in THF at 50 °C afforded a diiridium complex with two bridging tetraselenide CCO2Me (DMAD), 2 afforded the diselenolene complexes [Cp*Ir(μ-Se4){μ-Se2C2(CO2Me)2}IrCp*] and [IrCp*{Se2C2(CO2Me)2}] as well as the DMAD adduct to the latter [IrCp*{Se2C4(CO2Me)4}]. Analogous treatment of 2 with HC
CCO2Me (MAMC) resulted in formation of diiridium complexes with bridging