Chelating and tellurolate ligand-transfer studies of the complex fac-[Fe(CO)(3)(TePh)(3)](-): Crystal structures of heterodinuclear (CO)(3)Mn(mu-TePh)(3)Fe(CO)(3) and CpNi(TePh)(PPh3)

Complex fac-[Fe(CO)(3)(TePh)(3)](-) was employed as a "metallo chelating" l igand to synthesize the neutral (CO)(3)Mn(mu-TePh)(3)Fe(CO)(3) obtained in a one-step synthesis by treating fac-[Fe(CO)(3)(TePh)(3)](-) with fac-[Mn(C O)(3)(CH3CN)(3)](+). It seems reasonable to conclude that the d(6) Fe(II) [ (CO)(3)Fe(TePh)(3)](-) fragment is isolobal with the d(6) Mn(I) [(CO)(3)Mn( TePh)(3)](2-) fragment in complex (CO)(3)Mn(mu-TePh)(3)Fe(CO)(3). Addition of fac[Fe(CO)(3)(TePh)(3)](-) to the CpNi(I)(PPh3) in THF resulted in forma tion of the neutral CpNi(TePh)(PPh3) also obtained from reaction of CpNi(I) (PPh3) and [Na][TePh] in MeOH. This investigation shows that fac[Fe(CO)(3)( TePh)(3)](-) serves as a tridentate metallo ligand and tellurolate ligand-t ransfer reagent. The study also indicated that the fac-[Fe(CO)(3)(SePh)(3)] (-) may serve as a better tridentate metallo ligand and chalcogenolate liga nd-transfer reagent than fac-[Fe(CO)(3)(TePh)(3)](-) in the syntheses of he terometallic chalcogenolate complexes.