- New linker systems for superior immobilized catalysts
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The rigid linkers E(p-C6H4PPh2) 4 (E = Si, Sn) have been synthesized from the corresponding precursors E(p-C6H4Br)4 and immobilized by forming one (E = Si) or three (E = Sn) phosphonium groups that are attached to the silica support by electrostatic interactions. The remaining unquaternized phosphines are coordinated to Wilkinson-type Rh complexes. The catalyst immobilized by the rigid scaffold with three surface-bound phosphonium groups (E = Sn) displays superior catalytic activity and lifetime with respect to the hydrogenation of dodecene. This catalyst can be recycled 30 times in a batchwise manner under standardized conditions. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
- Beele, Bjoern,Guenther, Johannes,Perera, Melanie,Stach, Michaela,Oeser, Thomas,Bluemel, Janet
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supporting information; experimental part
p. 2729 - 2731
(2011/02/18)
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- Easily immobilized di- and tetraphosphine linkers: Rigid scaffolds that prevent interactions of metal complexes with oxide supports
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Di- and tetraphosphines with rigid phenyl-, biphenyl-, and tetraphenylstannane, -silane, and -methane scaffolds, and various substituents R, have been synthesized and immobilized via triethoxysilane-propagated formation of one or two surface-bound phospho
- Yang, Yuan,Beele, Bjoern,Bluemel, Janet
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p. 3771 - 3773
(2008/09/20)
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