The ortho-benzhydryl substituted 2-imino-1,10-phenanthrolyliron (II) dichlorides, Fe1-Fe8, are synthesized and characterized by FT-IR and elemental analysis, the molecular structure of complex Fe7 is confirmed by the single crystal X-ray diffraction. On treatment with modified methylaluminoxane (MMAO), the iron precatalysts Fe1-Fe4 and Fe8 bearing two ortho-CHPh₂ substituents display reasonable activities (up to 8.8 × 10⁴ g•mol⁻¹(Fe)•h⁻¹ at 40°C) toward ethylene dimerization (C₄ ranging 86~100%) along with minor hexenes, in which the selectivity of 1-butene ranges from 61.8% to 100%; meanwhile, the analogs Fe5-Fe7 bearing mono-ortho-CHPh₂ substituent display better activities (up to 61 × 10⁴ g•mol⁻¹(Fe)•h⁻¹ at 40°C) toward ethylene oligomerization. In comparison with the on-going commercial 2-imino-1,10-phenanthrolyliron (II) precatalysts from common anilines, the performance of iron precatalysts are impeded by their bulkier ligands.

合成了邻苯甲基取代的2-亚氨基-1,10-菲咯啉铁（II）二氯化物Fe1-Fe8，并通过FT-IR和元素分析对其进行了表征，通过单晶X射线证实了复合物Fe7的分子结构。衍射。用改性甲基铝氧烷（MMAO）处理时，带有两个邻-CHPh ₂取代基的铁预催化剂Fe1- Fe4和Fe8表现出合理的活性（在40°C时高达8.8×10 ⁴ g•mol ^-1（Fe）•h ^-1）向乙烯二聚（C ₄1-丁烯的选择性范围为61.8％至100％；以及次要的己烯。同时，带有单-邻-CHPh ₂取代基的类似物Fe5-Fe7具有更好的乙烯低聚活性（在40°C时高达61×10 ⁴ g•mol ^-1（Fe）•h ^-1）。与正在进行的来自普通苯胺的商业化2-亚氨基-1,10-菲咯啉铁（II）预催化剂相比，铁预催化剂的性能受到其较大配体的阻碍。