We have shown previously l'z that reactions of .u-vinylidene complexes Cp(CO);MnPt(I~-C=CHPh)I-,2 with iron nonacarbonyl can occur via two alternative routes depending on the nature of ligands L. When L = PPh3, the addition of the [Fe(CO)4] to vinylidene results in the formation of the trinuclear MnFePt la3-vinylidene cluster, l When L2 = Ph2PCH~_CH2PPh2 (dppe), the [Mn(CO)2CP] fragment is replaced by {Fe(CO)4] to form the tetranuclear PtFe3-~4-vinylidene cluster, z In continuation of the systematic studies in this area, we synthesized the first ~-vinylidene complex with the Mn--Pd bond (2) from Cp(CO)2Mn=C=CHPh (1) and Pd(PPh3) 4. (1,1-Dicarbonyl)(l-qS-cyclopentadienyl) ( 1,2-ls-phenylvinylidene) [2-rl2-bis(diphenylphosphino)ethane]manganesepalladium (3) was obtained by the replacement of the PPh 3 ligand by dppe. 3 In this work, we report on the results of studying the reaction of 3 with Fe2(CO) 9.The reaction of cluster 3 with Fe2(CO) 9 (benzene, 20 ~ 4 h) results in a mixture of products, which were isolated and characterized by the elemental analysis data and IR and NMR spectra. Three new clusters were obtained: (1,t,l,2,2,2,3,3,3-nonacarbonyl)-/a4-[ 1 -rl2,2,3,4-rl 1-(phenyl)ethenylidene]-[4-q2-bis(diphenylphosphino)ethane-PP" ]-bis( triangulo) (4) (green crystals, yield 9%),
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