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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis, structure and properties of [1,2,4]triazolo[4,3-a]pyridin-3-ylidene rhodium and palladium complexes
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Synthesis, structure and properties of [1,2,4]triazolo[4,3-a]pyridin-3-ylidene rhodium and palladium complexes

机译:[1,2,4]三唑并[4,3-a]吡啶-3-亚烷基铑和钯配合物的合成,结构和性质

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摘要

The reaction of [1,2,4]triazolo[4,3-a]pyridinium tetrafluoroborates with [RhCl(COD)](2) and [PdCl(allyl)](2) takes place under mild basic conditions (Et3N, THF, room temperature) to afford the corresponding [RhCl(COD)(Tripy)] and [PdCl(allyl)(Tripy)] complexes, respectively (Tripy = [1,2,4]triazolo[4,3-a]pyridin-3-ylidene), and their structures were analysed by X-ray diffractometry and spectroscopic techniques. The sigma-donor ability of the new ligands was estimated by comparative analysis of infrared nu(CO) stretching frequencies of [RhCl(CO)(2)(Tripy)] complexes, and proved to be strongly dependent on the substitution pattern. Additionally, a first insight into the catalytic properties of the latter in the Suzuki-Miyaura cross coupling demonstrates a good catalytic activity that enables the coupling of aryl chlorides at room temperature.
机译:[1,2,4]三唑并[4,3-a]四氟硼酸吡啶鎓与[RhCl(COD)](2)和[PdCl(烯丙基)](2)的反应在温和的碱性条件下进行(Et3N,THF ,室温)分别提供相应的[RhCl(COD)(Tripy)]和[PdCl(allyl)(Tripy)]配合物(Tripy = [1,2,4] triazolo [4,3-a]吡啶- 3-亚丙基),并通过X射线衍射和光谱技术分析其结构。通过对[RhCl(CO)(2)(Tripy)]配合物的红外nu(CO)拉伸频率进行比较分析,估计了新配体的sigma-donor能力,并被证明强烈依赖于取代模式。此外,对后者在Suzuki-Miyaura交叉偶联中的催化性能的初步了解证明了良好的催化活性,能够在室温下偶联芳基氯。

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