Abstract Aiming at developing highly efficient and more conveniently treated rare-earth metal catalyst systems, the performance of a series of the rare-earth metal amido complexes bearing 2-t-butylimino- or 2-amino-functionalized indolyl ligands as precatalysts toward isoprene polymerization was investigated. Under the activation of borate activator [Ph3C][B(C6F5)4] and AlR3, the monomeric bis(amido) complexes [2-(tBuN = CH)C8H5N]RE[N(SiMe3)2]2 (RE = Er (1), Y (2), Sm (3), Nd (4)) and the dinuclear complex {[µ-η5:η1:η1-2-(2,6-iPr2C6H3NCH2)C8H5N]Nd[N(SiMe3)2]}2 (5) exhibit different catalytic activities and cis-1,4-selectivities for isoprene polymerization depending on cocatalysts of aluminum alkyls, central rare-earth metals and the solvents. Among them, the homogeneous ternary system Nd complex 4 or 5/ [Ph3C][B(C6F5)4]/AliBu3 could very efficiently catalyze polymerization of isoprene under the relatively mild conditions to afford the cis-1,4-polyisoprenes (up to 98.3%) with high number-average molecular weights and narrow to moderate molecular weight distributions.

中文翻译：

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由 2-叔丁基亚氨基或 2-氨基官能化吲哚基配体支持的稀土金属酰胺络合物催化异戊二烯的顺式-1,4-聚合

摘要 为开发高效、处理更方便的稀土金属催化剂体系，研究了一系列带有 2-叔丁基亚氨基或 2-氨基功能化吲哚基配体的稀土金属酰胺配合物作为异戊二烯聚合反应的预催化剂的性能。被调查。在硼酸盐活化剂 [Ph3C][B(C6F5)4] 和 AlR3 的活化下，单体双（酰胺）配合物 [2-(tBuN = CH)C8H5N]RE[N(SiMe3)2]2 (RE = Er ( 1)、Y(2)、Sm(3)、Nd(4))和双核络合物{[μ-η5:η1:η1-2-(2,6-iPr2C6H3NCH2)C8H5N]Nd[N(SiMe3)2 ]}2 (5) 对异戊二烯聚合表现出不同的催化活性和 cis-1,4-选择性，这取决于烷基铝、中心稀土金属和溶剂的助催化剂。他们之中，