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First ruthenium complexes with a chelating arene carbene ligand as

First ruthenium complexes with a chelating arene carbene ligand as

Başlık: First ruthenium complexes with a chelating arene carbene ligand as;
catalytic precursors for alkene metathesis and cycloisomerisation
Cetinkaya, B; Demir, S; Ozdemir, I; Toupet, L; Semeril, D; Bruneau, C; Dixneuf, PH
Bağlantı: http://hdl.handle.net/11616/84748
Tarih: 2001

Özet:

 
Electron-rich carbene precursors 2 and 3, containing the imidazolidin-2-ylidene moiety with one (2) and two (3) pendent N-(2,4,6-trimethylbenzyl) groups, on reaction with [RuCl2(arene)](2) lead to ruthenium(II) complexes 5 and 6 containing the chelating 8-electron mixed arene-carbene ligand; the X-ray diffraction crystal structure of RuCl2{eta (1)- CN[CH2(eta (6)-2,4,6-Me3C6H2)]CH2CH2N(CH2CH2OMe)} 6, was established. These complexes are precursors of the unstable ruthenium-allenylidene intermediates 7 and 8, but are active catalysts either for selective catalytic alkene metathesis or cycloisomerization, depending on the nature of the 1,6-diene.
 
C1 Univ Ege, Dept Chem, TR-35100 Izmir, Turkey.
 
Inonu UNiv, Dept Chem, TR-44280 Malatya, Turkey.
 
Univ Rennes 1, Grp Mat Condensee & Mat, CNRS, UMR 6626, F-35042 Rennes, France.
 
Univ Rennes 1, Inst Chim, CNRS, UMR 6509, F-35042 Rennes, France.
 

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