A comparison of polymer-supported chlorotris-(triphenylphosphine)rhodium(i) to its homogeneous analog in the selective reduction of polynuclear heteroaromatic compounds

Add time:08/13/2019    Source:sciencedirect.com

A comparison between polymer-supported chlorotris(triphenylphosphine)rhodium(I) catalyst, P—Ph2PRh(Ph3P)2Cl, and its homogeneous analog in the selective hydrogenation of polynuclear heteroaromatic compounds provides evidence for differences in initial rates and in ability to exchange aromatic hydrogens for deuterium. Crosslinking of the polymer-supported catalyst also affected the hydrogenation rates, but diffusion into the polymer bead and surface mass transfer effects were not rate-limiting. High regioselectivity for the reduction of the nitrogen heterocyclic ring was found in the hydrogenation of a model coal liquid with the polymer-supported catalyst.

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