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

The redox condensation between [Pt3(CO)6n]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.