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Unsaturated NHC Complexes Immobilized by the Backbone: Synthesis and Application
Author(s) -
Li Peng,
Herrmann Wolfgang A.,
Kühn Fritz E.
Publication year - 2013
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201200837
Subject(s) - rhodium , carbene , catalysis , styrene , chemistry , substrate (aquarium) , ligand (biochemistry) , homogeneous , linker , combinatorial chemistry , polymer chemistry , organic chemistry , copolymer , polymer , biochemistry , oceanography , receptor , physics , computer science , thermodynamics , operating system , geology
The synthesis and an exemplary catalytic application of a SBA‐15‐supported rhodium– N ‐heterocyclic carbene (NHC) complex is reported. In contrast to the conventional method of immobilization of unsaturated NHC complexes, the rhodium–NHC compound described here is connected to the SBA‐15 surface by a linker originating from the backbone of the unsaturated NHC ligand. The unique characteristics of the new immobilization mode enable the supported NHC complexes to maintain two unchanged “wing‐tip” ligands. This method of immobilization of unsaturated NHC complexes provides a new way to maintain the original configuration of homogeneous NHC complexes in the heterogenized catalytic system. The immobilized rhodium–NHC catalyst is used in a hydrogenation reaction with styrene as substrate.