Highly trans-1,4 selective (co-)polymerization of butadiene and isoprene with quinolyl anilido rare earth metal bis(alkyl) precursors
作者:Dongtao Liu、Dongmei Cui
DOI:10.1039/c1dt10100e
日期:——
mono(alkyl) neodymium complex (5). Complexes 1, 2 and 5 in combination with aluminium alkyls and organoborates established homogenous ternary systems that exhibited versatile catalytic activities and trans-1,4 selectivities for the polymerization of butadiene, depending on the types of aluminium alkyl, organoborate and rare earth metal used. Furthermore, the trans-1,4 selective copolymerization of butadiene
所述Ñ -R -喹啉基-8-氨基配体HL 1-3(R = 2,6-我镨2 ç 6 ħ 3(HL 1),2,6-的Et 2 ç 6 ħ 3(HL 2),2-制备了,6-Me 2 C 6 H 3(HL 3)),其易于与一个当量反应。稀土金属三(烷基)的s至得到相应的二(烷基)络合物大号1 Y(CH 2森达3)2(THF)(1)和L 1- 3路(CH2 SiMe 3) 2(THF)( 2-4)通过烷烃消除。相反,用HL 1处理原位生成的钕(烷基)钕可得到单(烷基)钕配合物( 5)。配合物1, 2和5在用烷基铝和有机硼酸组合建立均匀的三元系统,其表现出多功能催化活性和反式为的聚合-1,4-选择性丁二烯,取决于所用的烷基铝,有机硼酸盐和稀土金属的类型。此外,反式-1,4选择性共聚丁二烯 和 异戊二烯是通过使用1 /的三元系统实现的AlMe 3/ [Ph 3 C] [B(C 6 F 5)4 ]。研究了共聚动力学和共聚物的热行为。