Reaction of 7 equivalents of tert-butylamine with TiCl4 in hexane at 0 °C gave [TiCl2(NCMe3)(NH2CMe3)2]21 which on thermalisation with 2,6-diisopropylaniline in toluene gave [TiCl2(NC6H3Pri2-2,6)(NH2CMe3)2]x2. Imido exchange of [TiCl2(NCMe3)(NH2CMe3)]x with o-toluidine or 2-tert-butylaniline and addition of pyridine gave [TiCl2(NC6H4Me-2)(py)3] and [TiCl2(NC6H4CMe3-2)(py)3] which crystallised to give [TiCl2(NC6H4Me-2)(py)2]23 and [TiCl2(NC6H4CMe3-2)(py)2]24. 2-Phenylaniline and [TiCl2(NCMe3)(py)3] gave [TiCl2(NC6H4Ph-2)(py)2]25 on crystallisation and reaction of tert-butylaniline or 2-phenylaniline with [TiCl2(NCMe3)(tmeda)] gave [TiCl2(NC6H4CMe3-2)(tmeda)] 6 and [TiCl2(NC6H4Ph-2)(tmeda)]27. Complexes 1, 3, 4, 5, 6, and 7 were characterised by X-ray crystallography and the possibility of imdo ligand C–N bond rotation taking place analysed and compared with the NMR spectra. [TiCl2(NCMe3)(tmeda)] and MAO·(MeAlO)n, polymerises ethylene at low pressure with low activity (3.2 g mmol−1 h−1 bar−1), [TiCl2(NC6H4CMe3)(tmeda)] or [TiCl2(NC6H4Ph-2)(tmeda)] and MAO gives a 4-fold increase in activity whereas propene is not polymerised but 1-hexene is. Heterogenisation by addition of [TiCl2(NCMe3)(NH2CMe3)2]21 to tmeda-functionalised crosslinked polystyrene or imido exchange of [TiCl2(NCMe3)(tmeda)] with NH2-functionalised crosslinked polystyrene gives supported complexes which do not polymerise ethylene at low pressure in the presence of MAO.
在 0 °C 时,将 7 个等量的
叔丁胺与 TiCl4 在己烷中反应,得到 [TiCl2(NCMe3)(NH2CMe3)2]21,再与
2,6-二异丙基苯胺在
甲苯中热化,得到 [TiCl2(NC6H3Pri2-2,6)(NH2CMe3)2]x2。将[TiCl2(NCMe3)(NH2CMe3)]x 与
邻甲苯胺或
2-叔丁基苯胺进行亚
氨基交换并加入
吡啶,得到[TiCl2(NC6H4Me-2)(py)3]和[TiCl2(NC6H4CMe3-2)(py)3],它们结晶后得到[TiCl2(NC6H4Me-2)(py)2]23 和[TiCl2(NC6H4CMe3-2)(py)2]24。2-苯基
苯胺和[TiCl2(NCMe3)(py)3]结晶后得到[TiCl2(NC6H4Ph-2)(py)2]25,
叔丁基苯胺或 2-苯基
苯胺与[TiCl2(NCMe3)(tmeda)]反应后得到[TiCl2(NC6H4CMe3-2)(tmeda)]6 和[TiCl2(NC6H4Ph-2)(tmeda)]27。络合物 1、3、4、5、6 和 7 通过 X 射线晶体学进行了表征,分析了 imdo
配体 C-N 键旋转的可能性,并与核磁共振光谱进行了比较。[TiCl2(NCMe3)(tmeda)]和 MAO-(MeAlO)n,在低压下聚合
乙烯的活性较低(3.2 g mmol-1 h-1 bar-1),[TiCl2(NC6H4CMe3)(tmeda)]或[TiCl2(NC6H4Ph-2)(tmeda)]和 MAO 的活性提高了 4 倍,而
丙烯没有聚合,
1-己烯却聚合了。通过将[TiCl2(NCMe3)(NH2CMe3)2]21 添加到 tmeda 功能化交联聚
苯乙烯中或将[TiCl2(NCMe3)(tmeda)]与 NH2 功能化交联聚
苯乙烯进行亚
氨基交换进行异质化,可得到有支撑的复合物,这些复合物在 MAO 存在的低压条件下不会聚合
乙烯。