作者:Christof Merckle、Simone Haubrich、Janet Blümel
DOI:10.1016/s0022-328x(01)00696-9
日期:2001.5
However, TON and maximal yield are the same for 1, 2, and 2i. In contrast to 1 and 2, the immobilized catalyst 2i can be recycled seven times, 4i three times. Catalysts 3 and 3i give maximal TOF for the hydrogenation of 7, followed by 8 and 9. The yields are below 100% for the homogeneous catalyst 3, but immobilization (3i) gives maximum yields for all substrates.
用于烯烃加氢的展示催化剂是威尔金森的络合物ClRh(PPh 3)3(1)。在此,威尔金森型催化剂ClRh [Ph 2 P(CH 2)3 Si(OEt)3 ] 3(2),反式-ClRh(CO)[Ph 2 P(CH 2)3 Si(OEt)3 ] 2(3)和螯合物ClRh(PPh 3)[Ph 2 PCH 2 CHOHCH 2 PPh 2 ](4)已使用双功能配体Ph 2 P(CH 2)3 Si(OEt)3(5)和Ph 2 PCH 2 CHOHCH 2 PPh 2(6)合成,并进行了充分表征。二氢配合物4(H)2已就地生成并通过NMR表征。复合物2,3和4已经被固定化在硅胶上,给2I,3I和4I分别通过固态NMR进行了研究。的催化活性2I - 4I为1-十二烯(氢化7),2-环己烯-1-酮(8),和4-溴苯乙烯(9)与这些均相类似物相比2和3,以及与1一样。尽管TON和TOF在1和2之间没有实质性