A series of amino-salicylaldimine ligands, 5-tert-butyl-3-(R-1-ylmethyl)-salicylaldimine (L1-4, R = morpholine, piperidine, pyrrolidine, 4-methylpiperazine) have been synthesised and structurally analysed. The molecular structure of compound (L1, R = piperidine) has been determined by single-crystal X-ray diffraction. These ligands reacted with [CrCl3(THF)3] in THF to form chromium complexes, which were isolated in high yields as stable green solids and characterised by means of IR and elemental analysis. Activated with methylaluminoxane (MAO), these complexes showed moderate catalytic activities for ethylene oligomerisaton.
我们合成了一系列
氨基
水杨醛亚胺配体,即 5-叔丁基-3-(R-1-基甲基)-
水杨醛亚胺(L1-4,R = 吗啉、
哌啶、
吡咯烷、4-甲基
哌嗪),并对其进行了结构分析。化合物(L1,R =
哌啶)的分子结构已通过单晶 X 射线衍射测定。这些
配体在
四氢呋喃中与 [CrCl3(THF)3] 反应生成
铬配合物,这些配合物以高产率分离出来,呈稳定的绿色固体,并通过红外和元素分析进行了表征。在甲基铝氧烷(MAO)的活化下,这些配合物对
乙烯的低聚作用表现出中等催化活性。