Chemistry of vinylidene complexes. XIII. The reaction between Cp(CO)_2MnPt(#mu#-C=CHPh)(#eta#~2-dppm) and Fe_2(CO)_9: simultaneous formation of the #mu#_3-vinylidene MnFePt and #mu#_4-vinylidene PtFe_3 clusters. Crystal structure of (#eta#~5-C_5H_5)M

摘要

The reaction between [Cp(CO)_2MnPt(#mu#-C=CHPh)(#eta#~2-dppm)]~1 (1) and [Fe_2(CO)_9] gives heterometallic MnFePt and PtFe_3 vinylidene clusters 2-4, in which diphosphine ligands are coordinated to metal cores in three different modes. In [(#eta#~2-dppm)PtFe_3(#mu#_4-C-CHPh)(CO)_9] (2) the Pt atom is chelated by dppm while in [CpMnFePt(#mu#_3-C=CHPh)(#mu#-dppm)(CO)_5] (3) dppm bridges the Pt-Fe bond. Complex 3 was shown to exist in two isomeric forms. The novel complex {CpMnFePt(#mu#_3-C=CHPh)(CO)_6[#eta#~1-Ph_2PCH_2P(=O)Ph_2]} (4), characterized by X-ray diffraction study, possesses a trimetallic chain core. The diphosphine ligand in 4 links to platinum by only one of phosphorus atoms whereas the second P atom is uncoordinated and oxidized to the phosphineoxide group.