Redox control of a dendritic ferrocenyl-based homogeneous catalyst
- Resource Type
- Authors
- Anne-Marie Caminade; Hanna Dib; Evamarie Hey-Hawkins; Paul Neumann
- Source
- Angewandte Chemie International Edition
Angewandte Chemie International Edition, Wiley-VCH Verlag, 2015, 54 (1), pp.311-314. ⟨10.1002/anie.201408314⟩
- Subject
- Chemistry
Ligand
chemistry.chemical_element
Homogeneous catalysis
General Chemistry
Photochemistry
Redox
Catalysis
Non-innocent ligand
Ruthenium
Moiety
[CHIM.COOR]Chemical Sciences/Coordination chemistry
Isomerization
- Language
- English
- ISSN
- 1433-7851
1521-3773
International audience; The application of a dendrimer in a redox-switchable catalytic process is reported. A monomeric and the corresponding dendritic ferrocenylphosphane ligand were used to develop well-defined controllable catalysts with distinct redox states. The corresponding ruthenium(II) complexes catalyze the isomerization of the allylic alcohol 1-octen-3-ol. By adding a chemical oxidant or reductant, it was possible to reversibly switch the catalytic activity of the complexes. On oxidation, the ferrocenium moiety withdraws electron density from the phosphane, thereby lowering its basicity. The resulting electron-poor ruthenium center shows much lower activity for the redox isomerization and the reaction rate is markedly reduced.