Facile synthesis of platinum based heterobimetallic carbonyl clusters from bis(1-alkenyl)Pt(II) precursors

Article abstract of DOI:10.1016/j.poly.2013.06.011

A new route for the high yield synthesis of platinum containing mixed bimetallic carbonyl clusters of the type [PtRu₂(CO)₈L ₂] (where L₂ = dppe, 1,2-bis(diphenylphosphino)ethane or dppp, 1,3-bis(diphenylphos-phino)propane; L=PPh₃) by the reaction of platinum-alkenyl [PtL₂(1-alkenyl)₂] precursors with [Ru₃(CO)₁₂] is reported. An unexpected multinuclear mixed cluster, [PtRu₄(CO)₁₃(μ₄-PCH ₂CH₂CH₂PPh₂)], obtained under prolonged refluxing conditions was also isolated. All the products were isolated and characterized by various spectroscopic and analytical techniques. In solution, the complex [PtRu₂(CO)₈(P Ph3)₂] gives [Pt₂Ru(-CO)₃(CO)₂(PPh₃) ₃] and Ru₃(CO)₁₁(PPh₃). The structures and relative energies of the intermediates and transition states in the proposed reaction mechanism for the {PtRu₂} clusters have been investigated using density functional theory.