Polymerization of Phenylacetylenes with Rhodium Zwitterionic Complexes: Enhanced Catalytic Activity by π-Acidic Diene Ligands

被引：37
|
作者：
Onishi, Naoya [1 ]
Shiotsuki, Masashi [1 ]
Sanda, Fumio [1 ]
Masuda, Toshio [2 ]
机构：
[1] Kyoto Univ, Dept Polymer Chem, Grad Sch Engn, Nishikyo Ku, Kyoto 6158510, Japan
[2] Fukui Univ Technol, Dept Environm & Biol Chem, Fac Engn, Fukui 9108505, Japan
来源：
MACROMOLECULES | 2009年 / 42卷 / 12期
关键词：
LIVING POLYMERIZATION; STEREOREGULAR POLYMERIZATION; HELICAL CONFORMATION; CHIRAL SUBSTITUENTS; RH; DERIVATIVES; ACETYLENES; META;
D O I：
10.1021/ma900293t
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Zwitterionic Rh catalysts bearing a series of tetrafluorobenzobarrelene (tfb) ligands proved to be highly active in the polymerization of phenyl acetylenes. The highest catalytic activity for the polymerization of phenylacetylene was observed with (tfb)Rh+[(eta(6)-Ph)B-Ph3] (1). Catalyst 1 displayed higher activity to produce higher molecular weight polymer than the conventional nbd analogue, (nbd)Rh+[(eta(6)-Ph)B-Ph3] (5, nbd = 2,5-norbornadiene). In the case of other zwitterionic Rh catalysts bearing polymethylated tfb ligands [tfb-Me-2, 2; tfb-Me-3, 3; tfb-Me-4, 4], the catalytic activity tended to decrease with increasing number of the incorporated methyl groups. Catalyst 1 also showed high activity in the polymerization of phenylacetylene derivatives irrespective of electron-donating or -withdrawing nature of ring-substituents of the monomers.
引用
收藏
页码：4071 / 4076
页数：6
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