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利用1-苯基-3-(2,4,6-三甲基苯基)丙烯酮和2-肼-9-芳基邻菲咯啉的缩合反应合成了一系列2-[N-(3-苯基-5-(2,4,6-三甲基苯基)吡唑啉)]-9-芳基邻菲咯啉类配体(L1-L4),分别与N iC l2反应得到了相应的配合物[N iC l2L](1-4),对配体和配合物进行了表征,并用X-单晶衍射分析了配合物4的晶体结构,表明N i中心为五配位的四方锥构型.化合物l-4在MAO存在下对乙烯齐聚表现出良好的催化活性.在1 MPa乙烯压力下,化合物4的催化活性最好,高达2.52×105g mo-l1h-1.讨论了配体空间位阻及反应条件对乙烯齐聚活性的影响,发现邻菲咯啉的9-位位阻对催化活性影响更明显.
A series of 2- [N- (3-tert-butylphenyl) propan-2-one derivatives were synthesized by the condensation reaction of 1-phenyl-3- -phenyl-5- (2,4,6-trimethylphenyl) pyrazoline)] - 9-aryl phenanthroline ligands (L1-L4) The corresponding complexes [NiCl 2 L] (1-4) were used to characterize the ligands and their complexes. The crystal structure of complex 4 was analyzed by X-ray single crystal diffraction. The results showed that the center of N i was quintic tetragonal Cone configuration.Compound l-4 showed good catalytic activity for the oligomerization of ethylene in the presence of MAO.The catalytic activity of compound 4 was the best at 2.5 MPa under ethylene pressure of 1 MPa, up to 2.52 × 105g mo-l1h-1. Ligand steric hindrance and reaction conditions on the oligomerization activity of ethylene showed that the 9-position resistance of orthophenanthroline had a more significant effect on the catalytic activity.