Organolanthanide Complexes Supported by Thiazole-Containing Amidopyridinate Ligands: Synthesis, Characterization, and Catalytic Activity in Isoprene Polymerization
作者:Lapo Luconi、Dmitrii M. Lyubov、Andrea Rossin、Tatyana A. Glukhova、Anton V. Cherkasov、Giulia Tuci、Georgy K. Fukin、Alexander A. Trifonov、Giuliano Giambastiani
DOI:10.1021/om500918y
日期:2014.12.22
the diamagnetic Lu3+ complex 5, a progressive and complete rearrangement of its metal coordination sphere takes place through a metal-to-ligand alkyl migration with subsequent benzothiazole ring-opening and generation of the Lu3+ mono(alkyl)-arylthiolate species stabilized by a tetradentate N–,N,N,S–} dianionic ligand. On the other hand, the 5-methylthiazole-containing complexes 3, 7, and 8 showed no
由三齿 N –,N,N }单阴离子5-甲基噻唑-或苯并噻唑-酰胺基吡啶配体负载的中性双(烷基)-有机锡配合物已经制备并完全表征:(L Thia Me 2)Ln(CH 2 SiMe 3)2 [Ln = Lu 3+(3),Er 3+(7),Yb 3+(8)]和(L BnTh Me 2)Lu(CH 2 SiMe 3)2(5)。与相关Y相似在3+系统中,噻唑单元的性质控制着溶液中最终催化剂的稳定性。在抗磁性的Lu 3+络合物5中,其金属配位球通过金属向配体的烷基迁移以及随后的苯并噻唑开环和Lu 3+的单(烷基)-芳基硫醇盐物种的生成而进行了逐步和完全的重排。由四齿 N –,N,N,S – }双阴离子配体稳定。在另一方面,含5-甲基噻唑配合物3,7,和8表明没有任何配体的重排的证据。配合物3 – 8在用选定的有机硼酸盐活化后,已在异戊二烯(IP)聚合中作为均相催化剂进行了测试。二元体系3 / TB和7