Tris(4-hydroxy-3,5-diisopropylbenzyl)amine as a new bridging ligand for novel trinuclear titanium complexes
作者:So Han Kim、Sungwoo Yoon、Sang-deok Mun、Hwi-Hyun Lee、Junseong Lee、Youngjo Kim
DOI:10.1016/j.poly.2011.10.021
日期:2012.1
the presence of p-toluenesulfonic acid or paraformaldehyde. Its solid state structure was determined by single crystal X-ray diffraction. Its fully deprotonated specie, (4-O-3,5-i-Pr2PhCH2)3N (L), was used to form novel trinuclear half-sandwich titanocene complexes, namely [(η5-C5Me5)TiCl2]3L (1) and [(η5-C5Me5)Ti(OMe)2]3L (2), which were then tested for the syndiospecific polymerization of styrene in
在对甲苯磺酸或低聚甲醛的存在下,通过2,6-二异丙基苯酚与六亚甲基四胺的反应合成了三(4-羟基-3,5-二异丙基苄基)胺(LH 3)。通过单晶X射线衍射确定其固态结构。其完全去质子化的种类,(4-O-3,5-我-Pr 2的PhCH 2)3 N(大号),用于形成新的三核半夹心络合物茂钛,即[(η 5 -C 5我5)的TiCl 2 ] 3 L(1)和[(η 5 -C 5Me 5)Ti(OMe)2 ] 3 L(2),然后在甲基铝氧烷(MAO)助催化剂存在下测试苯乙烯的间同特异性聚合。将它们的催化性能直接与三氯(五甲基环戊二烯基)钛(IV)(3)和二氯(2,6-二异丙基苯酚基)(五甲基环戊二烯基)钛(IV)(4)进行比较。1 / MAO和2 / MAO体系显示出比单核催化体系3 / MAO和4 / MAO更高的苯乙烯聚合活性,从而得到高分子量的间规聚苯乙烯。