Pressure modulates stereoregularities in the polymerization of propylene promoted by rac-octahedral heteroallylic complexes

被引：114

作者：

Volkis, V

Shmulinson, M

Averbuj, C

Lisovskii, A

Edelmann, FT

Eisen, MS ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel

[2] Univ Magdeburg, Chem Inst Otto Von Guericke, D-39106 Magdeburg, Germany

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 15期

关键词：

D O I：

10.1021/om980335d

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

This communication reports the synthesis and activity of four racemic mixtures of bis(benzamidinate) group-4 complexes, cis-[p-R'C6H4C(NR)(2)](2)MX2 (R' = CH3, R = SiMe3, M = Ti, X = Cl (I); R' = CH3, R = SiMe3, M = Zr, X = Cl (2); R' = H, R = i-pr, M = Zr, X = Cl (3); R' = CH3, R = SiMe3, M = Zr, X = CH3 (4)) as precatalysts for the stereoregular polymerization of propylene. These complexes catalyze the stereoregular polymerization. of propylene only under pressure in CH2Cl2, producing polypropylene with very Large isotacticities (mmmm % = similar to 95-98), high melting points (140-154 degrees C).

引用

页码：3155 / 3157

页数：3

共 46 条

[1]

AVERBUJ C, UNPUB

[2] Synthesis of titanium and zirconium complexes that contain the tridentate diamido ligand, [((t-Bu-d(6))N-o-C6H4)(2)O](2-)([NON](2-)) and the living polymerization of 1-hexene by activated [NON]ZrMe2 [J].