Vanadium(V) Arylimido Alkylidene N-Heterocyclic Carbene Alkyl and Perhalophenoxy Alkylidenes for the Cis, Syndiospecific Ring Opening Metathesis Polymerization of Norbornene

被引：21

作者：

Kawamoto, Yuta ^{[1
]}

Elser, Iris ^{[2
]}

Buchmeiser, Michael R. ^{[2
,3
]}

Nomura, Kotohiro ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Dept Chem, Hachioji, Tokyo 1920927, Japan

[2] Univ Stuttgart, Inst Polymer Chem, D-70569 Stuttgart, Germany

[3] German Inst Text & Fiber Res DITF Denkendorf, D-73770 Denkendorf, Germany

来源：

ORGANOMETALLICS | 2021年 / 40卷 / 13期

基金：

日本学术振兴会;

关键词：

MOLYBDENUM IMIDO; THERMALLY ROBUST; TUNGSTEN IMIDO; CYCLIC OLEFINS; GROUP VI; COMPLEXES; LIGANDS; ROMP; CATALYSTS; (IMIDO)VANADIUM(V)-ALKYL;

D O I：

10.1021/acs.organomet.1c00271

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Vanadium(V) arylimido alkylidene N-heterocyclic carbene (NHC) alkyl complexes of the type, V(N-2,6-R2C6H3)-(CHSiMe3)(CH2SiMe3)(NHC), [R = Me (1a- c), Cl (2a,b); NHC = 1,3-bis(2,6-dimethylphenyl)imidazol-2-ylidene (IXy, a), 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IDipp, b), 1,3bis(cyclohexyl)imidazol-2-ylidene (ICy, c)], and the perhalophenoxy substituted alkylidenes, V(N- 2,6-Cl2C6H3)( CHSiMe3)(OC6X5)(IXy) [X = F (3), Cl (4)], have been prepared. The catalytic activities in the ring opening metathesis polymerization (ROMP) of norbornene (NBE) by 1a-c and 2a,b increased by addition of C6X5OH (1.0 equiv). The perhalophenoxides 3 and 4 exhibited superior activities with turnover frequencies (TOFs) up to 208 s(-1). The resultant polymers possessed high molecular weights (Mn up to 9.56 x 10(5)) with cis-syndiotactic stereoregularity up to 98%.

引用

页码：2017 / 2022

页数：6

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