The Homogeneous Hydrogenation of Carbon--Carbon Multiple Bonds with Heteronuclear Platinum Clusters
The heteronuclear platinum clusters Pt2Co2(CO)8(PPh3)2 and Pt(C6H11NC)2[Mo(CO3)(eta 5-C5H5)]2 are poor catalysts for the hydrogenation of olefins and internal acetylenes, but they show a reasonable activity for the hydrogenation of terminal acetylenes. In this latter case the selectivity towards olefins is low. Whereas the PtMo2 cluster can be recovered unaltered from the reaction mixture, the Pt2Co2 cluster undergoes rather complex molecular rearrangements, which take place under the catalytic conditions. Finally the Pt2Co2 cluster, under well defined conditions, may act as a catalyst for the selective hydrogenation of diphenylacetylene to cis-stilbene.
Philosophical Transactions of the Royal Society of London Series A
- Pub Date:
- December 1982