| (cymene)ruthenium dichloride dimer | |
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Other names
Dichloro(p-cymene)ruthenium(II) dimer |
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| Identifiers | |
| CAS number | 52462-29-0 |
| ChemSpider | 8297222 |
| Jmol-3D images | Image 1 Image 2 |
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| Properties | |
| Molecular formula | C20H28Cl4Ru2 |
| Molar mass | 612.39 g mol−1 |
| Appearance | Red solid |
| Melting point |
247-250 °C (decomp.) |
| Solubility in water | Slightly, with hydrolysis |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
(Cymene)ruthenium dichloride dimer is the organometallic compound with the formula [(cymene)RuCl2]2. This red-coloured, diamagnetic solid is a reagent in organometallic chemistry and homogeneous catalysis.
The dimer is prepared by the reaction of the phellandrene with hydrated ruthenium trichloride.[1] Upon heating, [(cymene)RuCl2]2 undergoes exchange with other arenes, releasing free p-cymene. This dimeric molecule cleaves easily in the presence of Lewis bases to give monomeric adducts:
Such monomers adopt pseudo-octahedral piano-stool structures.
Treatment of [(cymene)RuCl2]2 with the chelating anionic ligand precursor TsDPENH gives (cymene)Ru(TsDPEN-H), a catalyst for asymmetric transfer hydrogenation.[2]
[(cymene)RuCl2]2 is also used to prepare catalysts (by monomerization with dppf) used in borrowing hydrogen catalysis[3], a catalytic reaction that is based on the activation of alcohols towards nucleophilic attack.
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