Hydrogenation of cyclohexene catalyzed by polymer- bound rhodium(I) and iridium(I) complexes

The catalytic hydrogenation of cyclohexene using RhI and IrI polymer-bound cationic complexes as catalysts is reported, and the solvent effect in these reductions has been investigated. In most case the reaction is characterized by the presence of a solvent-dependent induction period which has been investigated and is discussed. In several cases ESR-active RhII species have been detected at the end of the catalytic reaction. Recycling of the catalysts led to higher catalytic activity. © 1975