Symmetrically and unsymmetrically substituted bis(pyrazole)-palladium(II) and nickel(II) halides as Pre-catalysts for ethylene dimerization and Friedel-Crafts alkylation of toluene and benzene
作者:Lerato P MOETI、James DARKWA
DOI:10.17159/0379-4350/2016/v69a30
日期:——
and [(3-CF3,5-Phpz)2NiBr2] (10), were investigated as catalysts for ethylene oligomerization using four alkylaluminium compounds as co-catalysts in toluene, benzene and chlorobenzene. The palladium complexes with ethylaluminium dichloride (EtAlCl2) in toluene selectively produced ethyl- and butyl- toluenes via a Friedel-Crafts alkylation of toluene from the ethylene and butenes formed from the dimerization
双(吡唑)-钯(II)和镍(II)卤化物配合物,[[pz)2PdCl2](1),[(3,5-Me2pz)2PdCl2](2),[(3,5-tBu2pz)2PdCl2 ](3),[(3,5-Ph2pz)2PdCl2](4),[(3-CF3,5-Phpz)2PdCl2](5),[(pz)4NiBr2](6),[(3,5 -Me2pz)2NiBr2](7),[(3,5-tBu2pz)2NiBr2](8),[(3,5-Ph2pz)2NiBr2](9)和[(3-CF3,5-Phpz)2NiBr2]( 10)被用作乙烯低聚的催化剂,使用四种烷基铝化合物作为在甲苯,苯和氯苯中的助催化剂。钯与二氯化乙基铝(EtAlCl2)的络合物通过甲苯的弗里德-克来福特烷基化反应从乙烯和乙烯的二聚反应形成的丁烯中选择性生成乙基和丁基甲苯。另一方面,镍络合物产生丁烯及其弗里德-克来福特甲苯烷基化产物的混合物,但乙基甲苯却