Synthesis of Si-O-Si bridged diamido Group 4 complexes and the applications to polymerization of olefins

被引：3
|
作者：
Wei, Chuanzhi [1 ]
Gao, Yuli [2 ]
Zu, Fenghua [2 ]
Cui, Chunming [1 ,3 ,4 ,5 ,6 ]
机构：
[1] Nankai Univ, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China
[2] Petrochina Petrochem Res Inst, Beijing 100195, Peoples R China
[3] Haihe Lab Sustainable Chem Transformat, Tianjin 300192, Peoples R China
[4] Nankai Univ, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China
[5] Nankai Univ, Coll Chem, Tianjin 300071, Peoples R China
[6] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
来源：
APPLIED ORGANOMETALLIC CHEMISTRY | 2023年 / 37卷 / 04期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
(co)polymerization; bridged diamido; Group; 4; complexes; olefin; zirconium; HIGH-TEMPERATURE; ALPHA-OLEFINS; PROPENE POLYMERIZATION; CATALYSTS; COPOLYMERIZATION; NORBORNENE; PROPYLENE; TITANIUM; LIGANDS; NMR;
D O I：
10.1002/aoc.7048
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Titanium, zirconium, and hafnium complexes O[Me2Si(Dip)N](2)MCl2 [Dip = 2,6-iPr(2)C(6)H(3); M = Ti (1), Zr (2), Hf (3)], O[Me2Si(tBu)N](2)ZrCl2 (4), and O[iPr(2)Si(Dip)N](2)ZrCl2 (5) supported by Si-O-Si bridged diamido ligands were synthesized. X-ray diffraction analysis disclosed that complex 2 displays a distorted trigonal bipyramidal geometry. Complexes 1-5, upon the activation with sMAO, exhibited diverse catalytic performance for the polymerization of ethylene and copolymerization of ethylene with norbornene or 1-octene. For ethylene homopolymerization, both complexes 1-2 are good catalysts giving polymer with high molecular weight and narrow polydispersities. Complex 2 catalyzed copolymerization of ethylene with 1-octene exhibiting high catalytic activity but with norbornene showing moderate activity, affording corresponding high molecular weight copolymers with relatively high comonomer incorporations of 11% and 29%, respectively.
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页数：8
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