Английская Википедия:(Cymene)ruthenium dichloride dimer

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Шаблон:Chembox (Cymene)ruthenium dichloride dimer is the organometallic compound with the formula [(cymene)RuClШаблон:Sub]Шаблон:Sub. This red-coloured, diamagnetic solid is a reagent in organometallic chemistry and homogeneous catalysis. The complex is structurally similar to (benzene)ruthenium dichloride dimer.

Preparation and reactions

The dimer is prepared by the reaction of the phellandrene with hydrated ruthenium trichloride.[1] At high temperatures, [(cymene)RuClШаблон:Sub]Шаблон:Sub exchanges with other arenes:

[(cymene)RuClШаблон:Sub]Шаблон:Sub + 2 CШаблон:SubMeШаблон:Sub → [(CШаблон:SubMeШаблон:Sub)RuClШаблон:Sub]Шаблон:Sub + 2 cymene

(Cymene)ruthenium dichloride dimer reacts with Lewis bases to give monometallic adducts:

[(cymene)RuClШаблон:Sub]Шаблон:Sub + 2 PPhШаблон:Sub → 2 (cymene)RuClШаблон:Sub(PPhШаблон:Sub)

Such monomers adopt pseudo-octahedral piano-stool structures.

Precursor to catalysts

Treatment of [(cymene)RuClШаблон:Sub]Шаблон:Sub with the chelating ligand TsDPENH gives (cymene)Ru(TsDPEN-H), a catalyst for asymmetric transfer hydrogenation.[2]

[(cymene)RuClШаблон:Sub]Шаблон:Sub 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.

It can also used to prepare other ruthenium—arene complexes.[4]

References

  1. Шаблон:Cite book
  2. Шаблон:OrgSynth
  3. Hamid et al.; Advanced Synthesis & Catalysis Volume 349, Issue 10, pages 1555–1575, July 2, 2007; Шаблон:Doi
  4. Шаблон:Cite book

Шаблон:Ruthenium compounds