Chelating and Tellurolate Ligand‐Transfer Studies of the Complex fac ‐[Fe(CO) 3 (TePh) 3 ] − : Crystal Structures of Heterodinuclear (CO) 3 Mn(μ‐TePh) 3 Fe(CO) 3 and CpNi(TePh)(PPh 3 )

Complex fac ‐[Fe(CO) 3 (TePh) 3 ] − was employed as a “metallo chelating” ligand to synthesize the neutral (CO) 3 Mn(μ‐TePh) 3 Fe(CO) 3 obtained in a one‐step synthesis by treating fac ‐[Fe(CO) 3 (TePh) 3 ] − with fac ‐[Mn‐(CO) 3 (CH 3 CN) 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(μ‐TePh) 3 Fe(CO) 3 . Addition of fac ‐[Fe(CO) 3 (TePh) 3 ] − to the CpNi(I)(PPh 3 ) in THF resulted in formation of the neutral CpNi(TePh)(PPh 3 ) also obtained from reaction of CpNi(I)(PPh 3 ) and [Na][TePh] in MeOH. This investigation shows that fac ‐[Fe(CO) 3 (TePh) 3 ] − serves as a tridentate metallo ligand and tellurolate ligand‐transfer reagent. The study also indicated that the fac ‐[Fe(CO) 3 (SePh) 3 ] − may serve as a better tridentate metallo ligand and chalcogenolate ligand‐transfer reagent than fac ‐[Fe(CO) 3 (TePh) 3 ] − in the syntheses of heterometallic chalcogenolate complexes.