Syntheses of a dinuclear Ir complex containing bridging tetraselenide ligands [(C5Me5)Ir(μ-Se4)2Ir(C 5Me5)] and its conversion into Ir2Pd2Se3 and Ir2Pd3Se5 clusters

Abstract

Treatment of Cp*IrCl(μ-Cl)₂IrCp*Cl (Cp* = η⁵-C₅Me₅) with Li₂Se₄ gave a tetraselenide-bridged diiridium complex Cp*Ir(μ-Se₄)₂IrCp*, which reacted further with two equiv. of Pd(PPh₃)₄ to afford a mixture of bimetallic tetra- and penta-nuclear selenido clusters (Cp*Ir)₂{Pd(PPh₃)}₂(μ₃ -Se)₂(μ₂-Se) and (Cp*Ir)₂{Pd(PPh₃)}₃(μ₃ -Se)₃(μ₃-Se₂).