Stepwise addition of PtPPh₃fragments on [Re₂(CO)₁₀]. X-Ray crystal structures of the complexes [Re₂Pt_n(µ-CO)_2n(CO)_{10 – 2n}(PPh₃)_n](n= 2, 3), the first examples of tetra-and penta-nuclear rhenium–platinum mixed-metal clusters

Models for Platinum−Rhenium Bimetallic Catalysts: Sulfidation of Pt3Re Clusters

“…The platinum−sulfur distances span the range 2.322(8)−2.356(7) Å and are similar to those Pt−S bond distances observed in other sulfido-bridged platinum-containing clusters , The Re−S distances Re−S(1) = 2.463(8) Å and Re−S(2) = 2.470(8) Å are normal in comparison to other sulfido-bridged rhenium-containing clusters. , The Pt 3 S 2 ring displays an envelope conformation characterized by an S(1)−Pt(1)−Pt(2)−S(2) torsion angle of less than 3°, with the Pt(3) flap directed away from the Re atom. The Pt−P distances Pt(2)−P(3) = 2.290(8) Å and Pt(1)−P(6) = 2.300(8) Å, which are trans to a metal−metal bond, are longer than those (2.256(8)−2.286(8) Å) trans to a sulfur atom.…”

Models for Oxide Interactions in Bimetallic Catalysts: Oxo Clusters by Stepwise Oxidation of a Pt3Re Cluster

“…They are on the borderline of weak bonding interactions and nonbonding contacts: a Pt-Pt distance as long as 3.07 A has been regarded as evidence of weak metal-metal bonding but is best regarded as nonbonding in the present case. 19 The Pt(3)-Re distance [3.228(1) A] is clearly a nonbonding contact. Thus in 3 the metal atoms are held by normal covalent bonds in the Pt(l)Pt-…”

Stereochemistry of heterometallic platinum clusters

“…There are 21 clusters with 19 [53][54][55][56][57][58][59][60][61][62][63][65][66][67][68][69][70][71] containing two crystallographic independent molecules, one [64] contains three such molecules and another one [72] four ( [53] has approximately a trigonal bipyramidal metal core. Each PtPPh 3 fragment is connected to the Re-Re bridge (which elongates upon successive edge-capping) by two Re-Re bonds bridged by two equatorial, formally, terminal CO ligands.…”