Two bis‐imidazolium salts LH₂·Cl₂ and LH₂·(PF₆)₂ with acylated piperazine linker and two N‐heterocyclic carbene (NHC) silver(I) and palladium(II) complexes [L₂Ag₂](PF₆)₂ (1) and [L₂Pd₂Cl₄] (2) were prepared. The crystal structures of LH₂·Cl₂ and 1 were confirmed by X‐ray analysis. In 1, one 26‐membered macrometallocycle was generated through two silver(I) ions and two bidentate ligands L. The catalytic activity of 2 was investigated in Sonogashira, Heck‐Mizoroki and Suzuki‐Miyaura reactions. The results displayed that these C—C coupling reactions can be smoothly carried out under the catalysis of 2.

中文翻译：

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N-杂环卡宾银（I）和钯（II）配合物与酰化哌嗪键合的合成及在三种类型的CC偶联反应中的催化活性

带有酰化哌嗪连接基的两个双咪唑鎓盐LH ₂ ·Cl ₂和LH ₂ ·（PF ₆）₂和两个N杂环卡宾（NHC）银（I）和钯（II）配合物[L ₂ Ag ₂ ]（PF ₆）制备₂（1）和[L ₂ Pd ₂ Cl ₄ ]（2）。LH ₂ ·Cl ₂的晶体结构X射线分析证实了1个。在1中，通过两个银（I）离子和两个双齿配体L生成了一个26元的大金属环。在Sonogashira，Heck-Mizoroki和Suzuki-Miyaura反应中研究了2的催化活性。结果表明，这些CC偶联反应可以在2的催化下顺利进行。