Cationic alkyl rare-earth metal complexes bearing an ancillary bis(phosphinophenyl)amido ligand:: A catalytic system for living cis-1,4-polymerization and copolymerization of isoprene and butadiene

被引：261
作者：
Zhang, Lixin
Suzuki, Toshiaki
Luo, Yi
Nishiura, Masayoshi
Hou, Zhaomin
机构：
[1] RIKEN, Inst Phys & Chem Res, Organomet Chem Lab, Wako, Saitama 3510198, Japan
[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Japan
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2007年 / 46卷 / 11期
关键词：
alkyl ligands; block copolymers; lanthanides; P ligands; polymerization;
D O I：
10.1002/anie.200604348
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
(Chemical Equation Presented) Excellent activator: Living cis-1,4-polymerization and copolymerization of isoprene (IP) and butadiene (BD) are achieved for the first time in the presence of an in situ formed cationic alkyl yttrium species (see scheme). A related cationic alkyl lutetium complex, which provides a well-defined structural model for the true catalytically active species, is isolated and structurally characterized by X-ray crystallography. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.
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页码：1909 / 1913
页数：5
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