dc.contributor.author |
Ozdemir, I |
|
dc.contributor.author |
Demir, S |
|
dc.contributor.author |
Cetinkaya, B |
|
dc.contributor.author |
Toupet, L |
|
dc.contributor.author |
Castarlenas, R |
|
dc.contributor.author |
Fischmeister, C |
|
dc.contributor.author |
Dixneuf, PH |
|
dc.date.accessioned |
2022-10-19T11:24:48Z |
|
dc.date.available |
2022-10-19T11:24:48Z |
|
dc.date.issued |
2007 |
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dc.identifier.uri |
http://hdl.handle.net/11616/83086 |
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dc.description.abstract |
N-Heterocyclic carbene (NHC) ruthenium complexes containing a chelating NHC-eta(6)-arene ligand have been prepared and evaluated as precursors for ring opening metathesis polymerization (ROMP). The reaction of [RuCl2(p-cymene)](2) with electron-rich olefins of the bis(imidazolinylidene) type containing at least one arylmethyl-N chain (aryl: 2,4,6-trimethylphenyl, 3,4,5-trimethoxyphenyl) selectively leads, upon heating, to ruthenium(II) complexes 2 containing a chelating bridged carbene eta(6)-arene ligand. The reaction of complexes containing an additional ROCH2CH2N group with AgOTf leads to ionic complexes 5 with a tridentate trifunctional carbene/arene/ether ligand. The X-ray structure of [RuCl2{eta(1)-CN(CH2{eta 6-C6H2Me3-2,4,6})CH2CH2N(CH2-{C6H2(OMe)(3)-3,4,5})}] (2c) and that of the ionic ruthenium complex containing a trifunctional carbene/arene/ether ligand that provides ten electrons, (RuCl{eta(1)-CN(CH2{eta(6)-C6H2Me3-2,4,6})CH2CH2N(CH2CH2OCH3)}][CF3SO3] (5e), have been determined. The precursors 2 in the presence of AgOTf and propargyl alcohol, in order to produce an allenylidene initiator, and complexes 5 in the presence of propargyl alcohol lead to ROMP of norbornene. It is shown that initial chloride abstraction is required and that the catalyst activity is increased by using mesityl-ruthenium precursors and coordinated branched ether complexes. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007). |
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dc.description.abstract |
C1 Inonu Univ, Fac Sci & Arts, TR-44069 Malatya, Turkey. |
|
dc.description.abstract |
Ege Univ, Fac Sci, TR-35100 Izmir, Turkey. |
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dc.description.abstract |
Univ Rennes 1, CNRS, UMR 6626, Grp Matiere Condensee & Mat, F-35042 Rennes, France. |
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dc.description.abstract |
Univ Rennes 1, CNRS, UMR 6226, Inst Chim Inst, F-35042 Rennes, France. |
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dc.source |
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY |
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dc.title |
Chelating eta(6)-arene-eta(1)-carbene ligands in ruthenium complexes |
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