The synthesis of several dimeric silver compounds containing bis(pyrazol-1-yl)-6-(R)-s-triazine or bis(3,5-dimethylpyrazol-1-yl)-6-(R)-s-triazine ligands and coordinated triflate is described. The structures of two of the compounds have been determined by X-ray diffraction. Both derivatives show ligand-unsupported argentophilic contacts and different supramolecular interactions such as ÏâÏ stacking, CHâÏ or anionâÏ interactions. Hydrogen bonds are also established between the monomers. The relative orientation of the two monomers, which is mainly influenced by the formation of hydrogen bonds, reflects the symmetry of the R substituent of the triazine ring. Theoretical DFT calculations and Natural Bond Order (NBO) analysis of the two dimers further support the existence of the argentophilic interactions. Differences between the optimized and real structures can be mainly attributed to the underestimation of the ÏâÏ stacking interaction in the DFT studies.
描述了几种含有双(
吡嗪-1-基)-6-(R)-三嗪或双(3,5-二甲基
吡嗪-1-基)-6-(R)-三嗪
配体以及配位
三氟甲烷阴离子的二聚
银化合物的合成。通过X射线衍射确定了其中两个化合物的结构。两个衍
生物均表现出无
配体支持的
银亲和接触和不同的超分子相互作用,如π–π堆积、CH–π或阴离子–π相互作用。单体之间也建立了氢键。两个单体的相对取向主要受氢键形成的影响,反映了
三嗪环中R取代基的对称性。理论DFT计算和自然键级(NBO)分析进一步支持了
银亲和相互作用的存在。在DFT研究中,优化结构与真实结构之间的差异主要归因于对π–π堆积相互作用的低估。