production of a varied amount of polymer (6.9 - 91.5 wt.%). The nature of the pendant group has a significant impact on the catalytic performances of these Cr complexes. Particularly, catalytic precursors containing pendant O-donor groups (Cr1-Cr3) produce mostly oligomers (up to 89.0 wt%) while those bearing sulfur-base donor groups (Cr4 and Cr5) are primarily polymerization systems. DFT calculations suggested
由带有侧O-、S-和N-供体基团 [Cr(C 4 H 3 N-2-CH=N)Z的
吡咯烷-
亚胺配体支持的一组新
铬 (III) 配合物的合成和
乙烯反应性}(THF)Cl 2 ] (Z = CH 2 Ph-2-OMe, Cr1 ; Z = Ph-2-OPh, Cr2 ; Z = Ph-2-OMe, Cr3 ; Z = Ph-2-
SPh, Cr4 ;描述了 Z = Ph-2-SMe,Cr5;Z = CH 2 Py,Cr6;Z = C 2 H 4 Py,Cr7 )。Cr1-Cr7的活化与 MAO 生成活性体系,提供
乙烯 (C 4 -C 12 + )的全范围低聚,转换频率 (TOF) 在 13,900–94,200 mol(ethylene)·mol(Cr) –1 ·h –1范围内,以及生产不同数量的聚合物(6.9 - 91.5 wt.%)。侧基的性质对这些 Cr 配合物的催化性能有显着影响。特别是,含有侧氧供体基团(Cr1