Alkene Isomerisation Catalysed by a Ruthenium PNN Pincer Complex |
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| Authors: | Sébastien Perdriau Mu‐Chieh Chang Dr Edwin Otten Prof Dr Hero J Heeres Prof Dr Johannes G de Vries |
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| Affiliation: | 1. Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands), Fax: (+31)?50‐3634296;2. Department of Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands);3. Leibniz Institut für Katalyse e.V. An der Universit?t Rostock, Albert‐Einstein‐Strasse 29a, 18059 Rostock (Germany) |
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| Abstract: | The Ru(CO)H(PNN)] pincer complex based on a dearomatised PNN ligand (PNN: 2‐di‐tert‐butylphosphinomethyl‐6‐diethylaminomethylpyridine) was examined for its ability to isomerise alkenes. The isomerisation reaction proceeded under mild conditions after activation of the complex with alcohols. Variable‐temperature (VT) NMR experiments to investigate the role of the alcohol in the mechanism lend credence to the hypothesis that the first step involves the formation of a rearomatised alkoxide complex. In this complex, the hemilabile diethylamino side‐arm can dissociate, allowing alkene binding cis to the hydride, enabling insertion of the alkene into the metal–hydride bond, whereas in the parent complex only trans binding is possible. During this study, a new uncommon Ru0 coordination complex was also characterised. The scope of the alkene isomerisation reaction was examined. |
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| Keywords: | alkene isomerisation alcohols pincer complex ruthenium |
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