Reaction of the mixed-metal carbonyl cluster complex Ru5(CO) 15(C)[Pt(PBu3t)], 3, with PhC2H yielded the new compound PtRu5(CO)13(PBu3 t)(μ5-C)(μ3-PhC2H), 4, in 41% yield. Two new bimetallic cluster complexes, Pt2Ru 5(CO)13(PBu3t) 2(μ5-C)(μ3-PhC2H), 5, and Pt3Ru5(CO)13(PBu3t) 3(μ5-C)(μ3-PhC2H), 6, were subsequently obtained in 44% and 40% yield, respectively, from the reaction of 4 with an excess of Pt(PBu3t)2. All products were characterized crystallographically by single-crystal X-ray diffraction techniques. The structure of 4 consists of a square-pyramidal cluster of five ruthenium atoms with a Pt(PBu3t) group capping one of the Ru3 triangles. A PhC2H ligand bridges one of the PtRu 2 triangles. Compounds 5 and 6 are similar to 4 but have in addition one and two Pt(PBu3t) groups bridging one and two edges of the Ru5 square-pyramidal portion of the cluster. Compound 6 was shown to be dynamically active on the 31P NMR time scale by a process that involves an interchange of two of its inequivalent Pt(PBu3 t) groups.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry