2(CO) 6(μ-mbi) 2 as a precursor for mono- and polynuclear complexes containing the 2-mercaptobenzimidazolate (mbi) ligand]]>

摘要

The Me3NO initiated reaction between Mn2(CO)10and 2-mercaptobenzimidazole (mbiH) at room temperature leads to the formation of dinuclear Mn2(CO)6(μ-κ2-mbi)2(1) in which the metal atoms are linked by the sulfur atoms of the heterocyclic ligands. Complex1reacts with triphenylphosphine (PPh3), bis(diphenylphosphino)methane (dppm) and 1,2-bis(diphenylphosphino)ethane (dppe) at room temperature to afford mononuclear Mn(CO)3(PPh3)(κ2-mbi) (2), Mn(CO)3(κ2-dppm)(κ1-mbi) (3) and Mn(CO)3(κ2-dppe)(κ1-mbi) (4), respectively, via metal-sulfur bond scission. Upon gentle heating,1also reacts with Os3(CO)10(NCMe)2and Ru3(CO)12to yield the mixed-metal clusters MnOs3(CO)13(μ3-κ2-mbi) (5) and MnRu3(CO)13(μ3-κ2-mbi) (6), respectively, which contain a Mn(CO)3(mbi) fragment. All these new complexes have been characterized by analytical and spectroscopic data, together with single crystal X-ray diffraction analyses for1,3,4and5.