Ring-Opening Polymerization of THF by Aryloxo-Modified (Imido)vanadium(V)-alkyl Complexes and Ring-Opening Metathesis Polymerization by Highly Active V(CHSiMe3)(NAd)(OC6F5)(PMe3)2

被引：39

作者：

Nomura, Kotohiro ^{[1
,2
]}

Suzuki, Ken ^{[1
]}

Katao, Shohei ^{[2
]}

Matsumoto, Yuichi ^{[2
]}

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Sci & Engn, Dept Chem, Hachioji, Tokyo 1920397, Japan

[2] Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300101, Japan

来源：

ORGANOMETALLICS | 2012年 / 31卷 / 14期

关键词：

TRANSITION METAL CATALYSTS; ALKYLIDENE COMPLEXES; UNIQUE REACTIVITY; (2-ANILIDOMETHYL)PYRIDINE LIGANDS; OLEFIN POLYMERIZATION; PRECISE SYNTHESIS; ZIEGLER-NATTA; (ARYLIMIDO)VANADIUM(V) COMPLEXES; ETHYLENE POLYMERIZATION; POLY(ETHYLENE GLYCOL);

D O I：

10.1021/om300463f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Ring-opening polymerizations of THF using V(NR)(CH2SiMe3)(OAr)(2) [R = 2,6-Me2C6H3, 1-adamantyl (Ad), Ph; Ar = 2,6-Me2C6H3, C6F5] proceeded in a living manner in the presence of [Ph3C][B(C6F5)(4)], affording high molecular weight polymers with low PDI (M-w/M-n) values: the observed activity (initiation efficiency) was affected by the arylimido and aryloxo ligands employed. A new vanadium(V)-alkylidene, V(CHSiMe3)(NAd)(OC6F5)(PMe3)(2), prepared from V(NAd)(CH2SiMe3)(2)(OC6F5) by alpha-hydrogen elimination in n-hexane in the presence of PMe3 at 25 degrees C, exhibited remarkable catalytic activity for ring-opening metathesis polymerization of norbornene: the activity at 25 degrees C was higher than those by the reported vanadium(V)-alkylidenes and ordinary Mo(CHCMe2Ph)(N-2,6-Pr-i(2)-C6H3)((OBu)-Bu-t)(2).

引用

页码：5114 / 5120

页数：7

共 59 条

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