Synthesis and reactivity of neutral and cationic ruthenium(II) tris(pyrazolyl)borate alkylidenes

被引：124

作者：

Sanford, MS ^{[1
]}

Henling, LM ^{[1
]}

Grubbs, RH ^{[1
]}

机构：

[1] CALTECH, Div Chem & Chem Engn, Arnold & Mabel Beckman Lab Chem Synth, Pasadena, CA 91125 USA

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 24期

关键词：

D O I：

10.1021/om980683f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of neutral and cationic ruthenium(II) alkylidenes containing the hydrotris(pyrazolyl)borate (Tp) ligand have been prepared. The complex Tp(PCy3)(Cl)Ru=CHPh (2) was obtained by the reaction of (PCy3)(2)(Cl)(2)Ru=CHPh (1) and KTp. Treatment of 2 with AgBF4 or AgSbF6 in the presence of a variety of coordinating solvents afforded [Tp(PCy3)(L)Ru=CHPh](+) (L = H2O, CH3CN, pyridine) in high yield. The dynamic NMR behavior of these new complexes is discussed, and the X-ray crystal structure of [Tp(PCy3)(H2O)Ru=CHPh]BF4 (3) is reported. Alkylidenes 2-5 alone do not catalyze olefin metathesis reactions. However, complex 2 is activated for ring-closing metathesis by the addition of HCl, CuCl, and AlCl3.

引用

页码：5384 / 5389

页数：6

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