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Redox Control of a Dendritic Ferrocenyl‐Based Homogeneous Catalyst
Author(s) -
Neumann Paul,
Dib Hanna,
Caminade AnneMarie,
HeyHawkins Evamarie
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201408314
Subject(s) - isomerization , redox , catalysis , chemistry , ruthenium , allylic rearrangement , moiety , photochemistry , ligand (biochemistry) , monomer , dendrimer , combinatorial chemistry , inorganic chemistry , polymer chemistry , organic chemistry , receptor , biochemistry , polymer
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.