A POLYMER-SUPPORTED DICHLORO(CYCLOPENTADIENYL)RHODIUM(III) CATALYST

Article abstract of DOI:10.1016/S0022-328X(00)84008-5

Insoluble dichloro(η⁵-cyclopentadienyl)rhodium(II) has been attached to 20percent divinylbenzene cross-linked polystyrene by treating polymer-attached cyclopentadiene directly with rhodium trichloride trihydrate.Polymer-supported dichloro(η⁵-cyclopentadienyl)rhodium(III), I, is a good hydrogenation catalyst for olefins as well as arenes in the presence of excess triethylamine under 110 psig H2 at 70 deg C.It can also catalyze isomerization of allylbenzene in the absence of triethylamine at 85 deg C.Under 80 psig of CO and H2 (1/1) in the presence of triethylamine, I can be easily converted into the polymer-supported η⁵-cyclopentadienylrhodium dicarbonyl catalyst.Mechanisms for the catalyst preparation, hydrogenation and isomerization are also discussed.