(Cymene)ruthenium dichloride dimer
|(cymene)ruthenium dichloride dimer|
|Jmol-3D images||Image 1
|Molar mass||612.39 g mol−1|
|Melting point||247-250 °C (decomp.)|
|Solubility in water||Slightly, with hydrolysis|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
(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.
Preparation and reactions
The dimer is prepared by the reaction of the phellandrene with hydrated ruthenium trichloride. 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:
- [(cymene)RuCl2]2 + 2 PPh3 → 2 (cymene)RuCl2(PPh3)
Such monomers adopt pseudo-octahedral piano-stool structures.
[(cymene)RuCl2]2 is also used to prepare catalysts (by monomerization with dppf) used in borrowing hydrogen catalysis, a catalytic reaction that is based on the activation of alcohols towards nucleophilic attacks.
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