SYNTHESIS OF STABLE TUNGSTEN(VI) IMIDO ALKYLIDENE COMPLEXES - CRYSTAL-STRUCTURE OF AN AIR-STABLE CATIONIC ALKYLIDENE COMPLEX

被引：41

作者：

BLOSCH, LL ^{[1
]}

GAMBLE, AS ^{[1
]}

ABBOUD, K ^{[1
]}

BONCELLA, JM ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611

来源：

ORGANOMETALLICS | 1992年 / 11卷 / 07期

关键词：

D O I：

10.1021/om00043a010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Synthesis of remarkably air-, moisture-, and heat-stable tungsten(VI) imido alkylidenes has been achieved by addition of potassium hydrotris(1-pyrazolyl)-borate (KTp) or potassium hydrotris(3,5-dimethyl-1-pyrazolyl)borate (KTp') to W(CHC(CH3)2Ph)(NAr)(OTf)2-(DME) (1; Ar = 2,6-i-Pr2-C6H3, OTf = SO3CF3, DME = CH3OCH2CH2OCH3). Addition of KTp' to 1 yielded [Tp'W-(CHC(CH3)2Ph)(NAr)(pyrH)][OTf] (2; pyrH = 3,5-dimethylpyrazole), which is the first crystallographically characterized d0 cationic alkylidene. Compound 1 reacts with KTp to give TpW(CHC(CH3)2Ph)(NAr)(OTf) (5), which, in the presence of AlCl3, catalyzes the ring-opening metathesis polymerization of cyclooctene, yielding high-molecular-weight poly(1-octenylene) (M(n) = 98 900, M(w)/M(n) = 1. 2).

引用

页码：2342 / 2344

页数：3

共 20 条

[1] SYNTHESIS OF AN AIR-STABLE, MOISTURE-STABLE, AND THERMALLY STABLE TUNGSTEN(VI) OXO ALKYLIDENE COMPLEX - PRECURSOR TO AN AIR-STABLE AND MOISTURE-STABLE ROMP CATALYST [J].