New 1,2,3-triazole ligands through click reactions and their palladium and platinum complexes
作者:David Schweinfurth、Roberto Pattacini、Sabine Strobel、Biprajit Sarkar
DOI:10.1039/b910660j
日期:——
3-triazole, 2 were prepared by the reactions of the respective azides with 2-ethynylpyridine following the "click method". These ligands together with the reported ligands 1-(phenyl)-4-(2-pyridyl)-1,2,3-triazole, 3 and 1-(benzyl)-4-(2-pyridyl)-1,2,3-triazole, 4 were reacted with palladium and platinum precursors to give mononuclear cis-dichloropalladium and platinum complexes containing the triazole ligands
新的配体1-(4-异丙基苯基)-4-(2-吡啶基)-1,2,3-三唑1和1-(甲磺酰基)-4-(2-吡啶基)-1,2,3按照“点击法”,通过将各自的叠氮化物与2-乙炔基吡啶反应来制备2-三唑-2-。这些配体与已报道的配体1-(苯基)-4-(2-吡啶基)-1,2,3-三唑3和1-(苄基)-4-(2-吡啶基)-1,2,3 -三唑-4与钯和铂的前体反应,得到含有三唑配体的单核顺-二氯钯和铂配合物。游离配体3的结构表征表明,三唑环中的中心NN键具有双键特性,因此最好描述为“偶氮样” NN双键。3中的吡啶环相对于中心三唑环具有几乎“反”的构象。金属中心通过吡啶N和三唑N原子与配体结合。金属-N(三唑)距离短于金属-N(吡啶)距离。配体的循环伏安图显示还原过程出现在极负电势下。由于金属中心的sigma极化,金属中心的配位会引起还原电位的巨大阳极移位。还讨论了配体和配合物的UV / Vis光谱。将这种螯