PSEUDORAFT RHENIUM-PLATINUM CLUSTERS - SYNTHESIS AND CRYSTAL-STRUCTURE OF THE ANIONS [PTRE3(MU-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)6}n]2- (n almost-equal-to 10) and rhenium carbonyl anions gives two novel mixed-metal species, [PtRe3(mu-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.