摘要
Homogeneous catalysis Rh(PPh3)3Cl immobilized on MCM-41 modified with (OEt)3Si(CH2)3PPh2 results in a stable hydrogenation catalyst with turn over frequency (TOF) three times higher than that of Rh(PPh3)3C1 in the hydrogenation of cyclohexene. Leaching of the catalyst is only a minor factor with leaching rate 0.04 % for each cycle. However, immobilization of Rh(PPh3)2(CO)C1 on similar support can only have catalytic hydroformylation properties for the first few cycles. Decay of the catalyst is due to largh leaching rate with totally 22.4 % of Rh leached for the first three cycles.
