REGIOCHEMICAL AND STEREOCHEMICAL CONTROL IN POLYMERIZATION OF PROPYLENE OR STYRENE CATALYZED BY KAMINSKY-SINN-TYPE TITANOCENE, ZIRCONOCENE AND HAFNOCENE COMPLEXES

被引：2

作者：

MIKAMI, K

MOTOYAMA, Y

机构：

[1] Department of Chemical Technology, Faculty of Engineering, Tokyo Institute of Technology

来源：

JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN | 1994年 / 52卷 / 09期

关键词：

STEREOCONTROL; REGIOCONTROL; KAMINSKY-SINN-TYPE METALLOCENE COMPLEX; ISOTACTIIC POLYMERIZATION; SYNDIOTACTIC POLYMERIZATION; POLYPROPYLENE; POLYSTYRENE; CIS-ADDITION; PRIMARY INSERTION; SECONDARY INSERTION; C2; SYMMETRY; C(S) SYMMETRY; ANSA-METALLOCENE-METHYLALUMOXANE (MAO);

D O I：

10.5059/yukigoseikyokaishi.52.716

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A series of group IV metallocene complexes such as titanocenes, zirconocenes and hafnocenes possessing ansa-chain are discussed as regio- and stereoselective catalysts for polymerization of propylene or styrene. Isotactic and syndiotactic polypropylenes are produced via primary cis-addition by the catalytic use of C2- and C(s)-symmetric zirconocenes, respectively. Significantly, syndiotactic polystyrene is produced, in contrast, via secondary cis-addition even by using C1-symmetric titanocenes. The reaction mechanism of those polymerizations, the structure of catalytic species and the significant role of methylalumoxane (MAO) are also discussed.

引用

页码：716 / 721

页数：6

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