Alkene Isomerisation Catalysed by a Ruthenium PNN Pincer Complex
Journal
Chemistry ¡V A European Journal
Journal Volume
20
Journal Issue
47
Pages
15434-15442
Date Issued
2014
Author(s)
Perdriau, Sebastien
Chang, Mu-Chieh
Otten, Edwin
Heeres, Hero J.
Vries, Johannes G. de
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 Ru(0) coordination complex was also characterised. The scope of the alkene isomerisation reaction was examined.
SDGs
Type
journal article