Pseudo-raft rhenium–platinum clusters. Synthesis and crystal structure of the anions [PtRe3(µ-H)(CO)13]2– and [PtRe4(CO)17]2–, containing a central Pt atom surrounded by a folded stripe of Re atoms

Abstract

The redox condensation between [{Pt₃(CO)₆}_n]^2–(n≈ 10) and rhenium carbonyl anions gives two novel mixed-metal species, [PtRe₃(µ-H)(CO)₁₃]^2– and [PtRe₄(CO)₁₇]^2–, containing a Pt–CO unit interacting with three and four Re(CO)₄ moieties, respectively, arranged as a stripe folded around the Pt atom and whose formation confirms the tendency of Re atoms to cluster around Pt, giving structures based on Re₂Pt triangles with a low Pt: Re ratio.