Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
Centre for Advanced Technologies, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland.
Molecules. 2021 Jan 15;26(2):439. doi: 10.3390/molecules26020439.
A synthesis of a series of mono-T and difunctionalized double-decker silsesquioxanes bearing substituted triazole ring(s) has been reported within this work. The catalytic protocol for their formation is based on the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) process. Diverse alkynes were in the scope of our interest-i.e., aryl, hetaryl, alkyl, silyl, or germyl-and the latter was shown to be the first example of terminal germane alkyne which is reactive in the applied process' conditions. From the pallet of 15 compounds, three of them with pyridine-triazole and thiophenyl-triazole moiety attached to T or DDSQ core were verified in terms of their coordinating properties towards selected transition metals, i.e., Pd(II), Pt(II), and Rh(I). The studies resulted in the formation of four SQs based coordination compounds that were obtained in high yields up to 93% and their thorough spectroscopic characterization is presented. To our knowledge, this is the first example of the DDSQ-based molecular complex possessing bidentate pyridine-triazole ligand binding two Pd(II) ions.
在这项工作中，报道了一系列含有取代三唑环的单-T 和双功能化双层倍半硅氧烷的合成。其形成的催化方案基于铜（I）催化的叠氮化物-炔烃环加成（CuAAC）过程。我们感兴趣的各种炔烃 - 即芳基、杂芳基、烷基、硅基或锗基 - 并且后者被证明是第一个在应用过程条件下反应的末端锗烷炔烃的例子。在所研究的 15 种化合物中，有三种具有吡啶-三唑和噻吩-三唑部分连接到 T 或 DDSQ 核心的化合物，它们在与选定的过渡金属（即 Pd(II)、Pt(II)和 Rh(I)）的配位性质方面得到了验证。研究结果形成了四个基于 SQs 的配位化合物，其产率高达 93%，并对其进行了全面的光谱表征。据我们所知，这是第一个具有双齿吡啶-三唑配体结合两个 Pd(II)离子的基于 DDSQ 的分子配合物的例子。
