Thermomorphic polyethylene-supported olefin metathesis catalysts |
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| Authors: | Hobbs Christopher Yang Yun-Chin Ling Johnny Nicola Sally Su Haw-Lih Bazzi Hassan S Bergbreiter David E |
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| Institution: | Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, USA. |
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| Abstract: | The preparation of polyethylene-oligomer (PE(olig))-supported N-heterocyclic carbene ligands (NHCs) and their Ru complexes is described. These complexes are structurally analogous to their low molecular weight counterparts and can serve as thermomorphic, recoverable/recyclable ring-closing metathesis (RCM) catalysts. Because of the insolubility of PE(olig)-supported species at 25 °C, such complexes can perform homogeneous RCM reactions at 65 °C and, upon cooling, precipitate as solids. This allows for their quantitative separation from solutions of products. |
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