Synthesis, Characterization And Properties Of Iron, Cobalt And Ruthenium Carbonyl Clusters Containing Multiphosphine Ligand

There are two sections in this paper:1) Reactions of a series of transition metal carbonyl clusters with organic phosphine compound were carried out.2) The aryl-acylamide hydrogenation catalyzed by Fe and Ru carbonyl clusters was investigated.During this work, a total of seven new clusters were obtained. All clusters were characterized by IR, C/H analysis,1HNMR,13C NMR,31PNMR and MS. Furthermore, the products of aryl- acylamide hydrogenation catalyzed by Ru3(CO)12, Fe and Ru carbonyl clusters containing multiphosphine ligand were analysized using GC-MS, IR and UV-vis spectroscopy.Firstly, the reactions of [(CO2CH2C=CH-μ)2][Co2(CO)6]2Ⅰ, [C6H4(CO2 CH2C=CH-μ)2][Co2(CO)6]2Ⅱand [(CH2)8(CO2CH2C=CH-μ)2][Co2(CO)6]2Ⅲwith PPh3 were carried out to afford five new phosphine-substituted alkyne-bridging tetrahedral linked carbonyl clusters (1-5), respectively.Secondly, alkyne-bridging tetrahedral cobalt carbonyl cluster [(CO2CH2 C≡CH-μ)2][Co2(CO)6]2Ⅰreact with the tris-phosphine compound CH3C(CH2PPh2)3 (1,1,1-tris(diphenyl phosphino methyl)ethane:triphos) to give a new phosphine-substituted carbonyl cluster 6. Thirdly, a diphosphine-substituted carbonyl cluster 7 was obtained by reaction of Ru3(CO)12 with 1,1-Bis(diphenylphosphino) ferrocene.Finally, the catalytic activity of aryl-acylamide hydrogenation catalyzed by Ru3(CO)12, Fe and Ru carbonyl clusters containing multiphosphine ligand were investigated at 100℃for 24h. The products were analysized using GC-MS, IR and UV-vis spectroscopy. The data of IR and UV-vis showed that the frameworks of clusters were not changed remarkably during the reaction.