| Abstract: | The dimanganese bridging borylene complex μ‐BMes {(η5‐C5H4Me)Mn(CO)2}2] was synthesized from Mes(Cl)BB(Cl)Mes and K(η5‐C5H4Me)Mn(CO)2H] at low temperature, providing a small sample after manual separation of crystals, allowing a perfunctory spectroscopic analysis, but affording conclusive X‐ray crystallographic structural data. The trimetallic bridging borylene complex (μ3‐BCl){{(η5‐C5H4Me)Mn(CO)2} {Pd(PCy3)}2}] was prepared by the addition of Pd(PCy3)2] to a solution of μ‐BCl{(η5‐C5H4Me)Mn(CO)2}2], affording pure crystals that were fully characterised including X‐ray crystallographic analysis. The structure is reconciled with detailed theoretical analysis for related model complexes, (μ3‐BX){{(η5‐C5H5)Mn(CO)2}{Pd(PMe3)}2}] (X = Me, Cl). |
