Synthesis and structure of heterometallic complexes (RhFe, CoFe) containing bridging 1,2-dicarba-closo-dodecarborane-1,2-dichalcogenolato ligands

摘要

The prototype hetero-binuclear complexes containing metal-metal bonds, {Cp'Rh[E2C2(B10H10)]}[ Fe(CO)(3)] (Cp' = Cp* = eta(5)- Me5C5, E = S(5a), Se(5b); Cp' = Cp'' = eta(5)- 1,3- tBu(2)C(5)H(3), E = S(6a), Se(6b)) and {Cp' Co[E2C2(B10H10)]}[Fe(CO)(3)] (Cp' = Cp* = eta(5)- Me5C5, E = S(7a), Se(7b); Cp' = Cp = eta(5)- C5H5, E = S(8a), Se(8b)) were obtained from the reactions of 16-electron complexes Cp' Rh[ E2C2( B10H10)] (Cp' = Cp*, E = S(1a), Se(1b); Cp' = Cp'', E = S(2a), Se(2b)), Cp'Co[E2C2(B10H10)] (Cp' = Cp*, E = S(3a), Se(3b); Cp' = Cp, E = S(4a), Se(4b)) with Fe(CO)(5) in the presence of Me3NO. The molecular structures of {Cp*Rh[E2C2(B10H10)]}[Fe(CO)(3)] (E = S(5a), Se(5b)), {Cp''Rh[S2C2(B10H10)]}[Fe(CO)(3)] (6a) {Cp*Co[S2C2(B10H10)]}[Fe(CO)(3)] (7a) and {CpCo[S2C2(B10H10)]}[Fe(CO)(3)] (8a) have been determined by X-ray crystallography. All these complexes were characterized by elemental analysis and IR and NMR spectra.