Alkene Isomerisation Catalysed by a Ruthenium PNN Pincer Complex1. Issue 47 (26th September 2014)

• Record Type: Journal Article
• Authors: Perdriau, Sébastien; Chang, Mu‐Chieh; Otten, Edwin; Heeres, Hero J.; de Vries, Johannes G.
• Is Part Of: Chemistry. Volume 20:Issue 47(2014)
• Page Start: 15434
• Page End: 15442
• Publication Date: 2014-09-26
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201403236
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The [Ru(CO)H(PNN)] pincer complex based on a dearomatised PNN ligand (PNN: 2‐di‐<italic>tert</italic>‐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 <italic>cis</italic> to the hydride, enabling insertion of the alkene into the metal–hydride bond, whereas in the parent complex only <italic>trans</italic> binding is possible. During this study, a new uncommon Ru⁰ coordination complex was also characterised. The scope of the alkene isomerisation reaction was examined.</p> </abstract>