Homogenous catalysts tend to outperform heterogenous catalysts in terms of efficiency and selectivity, but present the problem of catalyst-product separation. Separation usually requires destructive techniques, making the catalyst unuseable. Ideally the catalyst would be recycled, especially when dealing with expensive precious metals.This project is concerned with immobilising homogeneous catalysts onto a support in order to combine the advantages of homogeneous catalysis with the ease of separation and recovery associated with heterogeneous catalysis. Problems with previous immobilised catalysts have been metal leaching and reduced activities/selectivities. Our research focuses on the design and synthesis of tethered Cp* based Group 9 complexes to immobilise onto functionalised supports and use in flow systems for transfer hydrogenation reactions. The strong metal-Cp* bond with covalent attachment of the Cp* to the support should prevent metal leaching. These systems will have great potential use in the pharmaceutical and fine chemical industry.

Tethered Cp* basedgroup 9 complexes as transfer hydrogenation catalysts

243rd National Meeting (2012)

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