126294-92-6Relevant academic research and scientific papers
Cluster synthesis. 43. New layer-segregated platinum-ruthenium cluster complexes and their reactions with diphenylacetylene
Adams, Richard D.,Barnard, Thomas S.,Li, Zhaoyang,Wu, Wengan,Yamamoto, John
, p. 2357 - 2364 (1994)
The new complex Pt3Ru6(CO)21(μ-H)3(μ 3-H) (1) was obtained in 83% yield from the reaction of Ru4Pt2(CO)18 with hydrogen (1 atm) at 97°C. The molecular structure was found to consist of three triangular layers of nine metal atoms arranged in the form of a face-shared bioctahedron. The central shared layer consists of three platinum atoms, while the outer layers consist of ruthenium triangles. Three hydride ligands bridge each edge of one Ru3 triangle, while the fourth hydride ligand is a triple bridge across the other Ru3 triangle. Compound 1 was converted to the alkyne complex Pt3Ru6(CO)20(μ3-PhC 2Ph)(μ3-H)(μ-H) (2) by reaction with PhC2Ph. This complex contains a layered structure of Pt3 and Ru3 triangles similar to 1 but also has a triply bridging PhC2Ph ligand coordinated to one of the ruthenium triangles. Compound 2 slowly adds 1 equiv of CO to form the complex Pt3Ru6(CO)21[μ-PhCC(H)Ph](μ-H) (3) which contains an edge bridging σ-π coordinated diphenylvinyl ligand formed by the transfer of one of the hydride ligands in 2 to the diphenylacetylene ligand. Treatment of 3 with CO yields (Z)-stilbene by transfer of the remaining hydride ligand to the diphenylvinyl ligand, and the cluster is then degraded to Ru3(CO)12 and Pt2Ru4(CO)18. Crystal Data: for 1, space group = P21/c, a = 18.157(3) A?, 6 = 11.701(4) A?, c = 17.580(4) A?, β = 101.03(2)°, Z = 4, 2657 reflections, R = 0.033; for 2, space group Pccn, a = 10.848(2) A?, b = 45.507(4) A?, c = 17.169(2) A?, Z = 8, 4441 reflections, R = 0.043; for 3, space group P21/c, a = 12.360(6) A?, b = 11.521(4) A?, c = 16.628(8) A?, β = 106.10(4)°, Z = 2, 2061 reflections, R = 0.041.
