Reactions of Pt3Ru6(CO)2(μ3-H)(μ-H)3 with Phos[phanes — The Synthesis and Structural Characterizations of [Pt(PMe3)3H][Pt3Ru6(CO)21(μ3-H)(μ-H)2] and [Pt3Ru6(CO)20(PPh3)(μ-H)3(μ3H)]

✍ Scribed by Adams, Richard D. ;Barnard, Thomas S. ;Li, Zhaoyang ;Zhang, Lijuan

• Publisher: Wiley (John Wiley & Sons)
• Year: 1997
• Tongue: English
• Weight: 497 KB
• Volume: 130
• Category: Article
• ISSN: 0009-2940
• DOI: 10.1002/cber.19971300609

✦ Synopsis

The reactions of [Pt3R~6(CO),l(p-H)3(p3-H)] (1) with PMe3 and PPh3 have produced the salts [Pt(PR3)3H]-[Pt3R~6(CO)2,(p3-H)(p-H)2]r 5a and 5d, R = Me and Ph in the yields 9% and 22%, respectively. By contrast the reaction of 1 with PPh, in the presence of Me3N0 has yielded the phosphane-substituted derivative [Pt3Ru6(CO)20(PPh3)(p-H)3(p3-H)] (6) in 22% yield. Compounds 5a and 6 were characterized by single crystal X-ray diffraction analysis. Compounds 5a and 5d are salts of the anion [Pt3Rue(CO),,(p3-H)(p-H),]-.

The anion contains a layer segregated Ru3Pt,Ru, structure similar to that of 1 with two bridging hydride ligands on one Ru3 triangle and one semi-triply bridging hydride ligand on the other. The cation [Pt(PR,),H] ' was evidently formed by the abstraction of platinum from other molecules of 1. Compound 6 is a PPh3 derivative of the parent 1 that also contains the layer segregated stacking of Ru3 and Pt3 triangles. The PPh3 ligand is coordinated to one of the ruthenium atoms in a n axial position.

We have shown that 1 is deprotonated by base (OH-) and the resultant anions can be used to prepare a variety of the mixed metal cluster complexes: P~~Ru~Au(PE~~)~~(~-