Ethylene polymerisation productivities of tris(pyrazolyl)methane-supported catalysts [Ti(NR)HC(Me2pz)3}Cl2] show a dramatically different dependence on the imido R-group compared to those of their TACN analogues, attributed to differences in fac-N3 donor topology; when treated with AliBu3, the zwitterionic tris(pyrazolyl)methide compound [Ti(N-2-C6H4tBu)C(Me2pz)3}Cl(THF)] also acts as a highly active, single site catalyst (TACN = 1,4,7-trimethyltriazacyclononane).
三(
吡唑基)
甲烷支撑催化剂[Ti(NR)HC(Me2pz)3}Cl2]的
乙烯聚合生产率与其 TACN 类似物的
乙烯聚合生产率相比,对
咪唑 R 基的依赖性有很大不同,这归因于面-N3 给体拓扑结构的差异;用 AliBu3 处理时,齐聚物三(
吡唑基)
甲烷化合物 [Ti(N-2-C6H4tBu)C(Me2pz)3}Cl(THF)]也是一种高活性的单位点催化剂(TACN = 1,4,7-三甲基三氮杂
环壬烷)。