The new butterfly cluster [Rh2Co2(CO)6(μ-CO)4(μ4, η2-HC≡CFeCp2)] 3 was obtained by the reaction of [Rh2Co2(CO)12] 1 with the 1-alkyne ligand HC≡CFeCp2 2, and the structure of cluster 3 has been established by single-crystal X-ray diffraction methods.
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