Synthesis and Structure of the Tetradecker Complex Bis(tricarbonylmanganese-μ, η-thiadiborolene)iron

The first tetradecker complex (2) contains four planes of ligands (two C2B2S rings as π6‐ and two (CO)3 groups as σ6‐electron donors) which are held together by three d6 metal ions. Compound (2) is synthesized by heating of (1) with Mn2(CO)10 and [CpFe(CO)2]. The resulting triple‐decker complex is transformed into the salt [(C6H6)Fe·(1)·Mn(CO)3]+AlCl 4− via ligand exchange. Thermolysis of the salt gives the orange‐red (2).