STERIC EQUIVALENCE BETWEEN INTERNAL AND EXTERNAL DONORS AS POLYMERIZATION STEREOREGULATORS - A MOLECULAR MECHANICS STUDY

被引：25

作者：

BARINO, L ^{[1
]}

SCORDAMAGLIA, R ^{[1
]}

机构：

[1] HIMONT ITALIA SRL,CTR RIC G NATTA,MOLEC MODELING GRP,MONTEDISON GRP,I-20124 MILAN,ITALY

来源：

MACROMOLECULAR SYMPOSIA | 1995年 / 89卷

关键词：

D O I：

10.1002/masy.19950890112

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

New models for steric environment of Ti isospecific polymerization sites on MgCl2 microcrystals are presented. They directly involve the presence of a donor molecule in order to obtain chiral activable Ti atoms otherwise belonging to isolated adsorbed TiCl4 molecules or Ti2Cl8 dimers which are lacking the required symmetry. The most important steric features of donor molecules have been obtained through structure-activity relationships and molecular comparisons, while their adsorption on MgCl2 faces lateral to (001) has been studied through a conformational analysis approach.

引用

页码：101 / 111

页数：11