Preparation of a palladium dimer with a cobalt-containing bulky phosphine ligand: Its application in palladium catalyzed Suzuki reactions

A palladium dimer with a cobalt-containing phosphine ligand, {(μ-PPh2CH2PPh2)Co2(CO)4(μ,η-(tBu)2PCCC6H4-κC1)Pd(μ-Cl)}2 (3), was prepared from the reaction of its monomer precursor, (μ-PPh2CH2PPh2)Co2(CO)4(μ,η-(tBu)2PCCC6H4-κC1)Pd(μ-OAc) (2), with LiCl. Suzuki coupling reactions were carried out catalytically using 2 and 3 as catalyst precursors.