【摘要】 合成了一系列带有不同取代基的 β-二亚胺配体及其 Ni( )的配合物 .利用核磁共振谱、元素分析和单晶 X射线衍射等手段对配体及配合物进行了表征 .元素分析和单晶结构分析表明 ,在相同的实验条件下苯基取代的 β-二亚胺配体锂盐与 Ni Cl2 反应只能得到双配体化合物 1 ;而 2 ,6-二甲基苯基及 2 ,6-二异丙基苯基取代的配体锂盐与 Ni Cl2 反应得二聚的单氯化物 2和 3 ,2个 Ni原子通过双氯桥连接在一起 .配合物 2和3经烷基铝活化后催化乙烯聚合可得到高分子量聚乙烯 ,活性可达到 2 .0× 1 0 5g PE/(mol cat· h) ,分子量最高可达到 1 0 0万以上 .更多还原

【Abstract】 A series of β-diketoiminato ligands with different phenyl substituents and their Ni(Ⅱ) complexes were synthesized. The ligands and the Ni(Ⅱ) complexes were characterized by elemental analysis, 1H NMR and X-ray crystallography. The reaction of NiCl 2 with lithium salt of the ligand and phenyl substituents in THF gives bis(β-diketoiminato) Ni(Ⅱ) complex 1, while the reactions with lithium salt of the ligand with 2,6-Me 2C 6H 3 or 2,6- iPr 2C 6H 3 substituents produce dimeric β-diketoiminato Ni(Ⅱ) chloride complexes 2 and 3. When activated by AlR 3, complexes 2 and 3 exhibit high catalytic activities for ethylene polymerization, and polyethylenes with a high molecular weight were abtained.更多还原