Abstract
Abstract Three bulky mono-dentate alkyne-bridged dicobalt-phosphine complexes [(μ-PPh2CH2PPh2)Co2(CO)4](μ,η-PhCCPPh2) 4a , [(μ-PPh2CH2PPh2)Co2(CO)4](μ,η-Me3CCCPPh2) 5a and [(μ-PPh2CH2PPh2)Co2(CO)4](μ,η-Me3SiCCPPh2) 6a were prepared from the reactions of the bis(diphenylphosphino)methylene (dppm) bridged dicobalt complex Co2(CO)6(μ-Ph2PCH2PPh2) with PhCCPPh2 1 , Me3CCCPPh2 2 , and Me3SiCCPPh2 3 , respectively. These three metal-containing compounds 4a , 5a and 6a were employed as ligands, replacing conventional organic phosphines, in the Suzuki cross-coupling reactions and have been proved to be effective, authentic mono-dentate phosphine ligands.
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