Ligand substitutions in Ru-Pt clusters: Isolation of compounds with unusual geometries
(2003) Journal of the Chemical Society. Dalton Transactions — n° 4, p. 672-684 (2003)
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- Ligand substitution reactions of the COD (1,5-cyclooctadiene) ligand for CO or phosphines in the clusters [Ru5C(CO)14Pt(COD)] (1) and [Ru6C(CO)16Pt(COD)] (2) were investigated. Reactions with carbon monoxide gave selectively [Ru5CPt(CO)16] (3) from 1, but led to loss of either a ruthenium or the Pt(COD) unit from the Ru6Pt cluster (2). Substitution of the COD ligand by PPh3 in 1 gave [Ru5C(CO)14Pt(PPh3)2] (8) selectively, while with dppm the main product of the reaction was [Ru5C(CO)14Pt(μ-dppm)] (10). On the other hand, the reactions involving [Ru6C(CO)16Pt(COD)] (2) and phosphines led mainly to extrusion of the Pt(COD) fragment and formation of Ru-only derivatives. More precisely, with triphenylphosphine, the two clusters [Ru6C(CO)16PPh3] (16) and [Ru6C(CO)15(PPh3)2] (18) were obtained from 2, while with dppm, the compounds [Ru6C(CO)15(dppm)] (15) and [Ru6C(CO)13(dppm)2] (19) were formed. In the latter case, two additional products of increased nuclearity were isolated: [Ru6C(CO)15Pt2(dppm)] (20) and [Ru6C(CO)16Pt3(dppm)2] (21). All the compounds described were characterised by spectroscopic methods and the structures of the new species were determined by X-ray crystallography.
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Hermans, S., Khimyak, T., Feeder, N., Teat, S. J., & Johnson, B. F. G. (2003). Ligand substitutions in Ru-Pt clusters: Isolation of compounds with unusual geometries. Journal of the Chemical Society. Dalton Transactions, 4, 672-684. https://hdl.handle.net/2078.5/206596 (Original work published 2003)