This article reports the design and synthesis of donor–acceptor–donor type ferrocenyl-substituted pyrazaboles by the Pd-catalyzed Suzuki and Sonogashira coupling reactions. The photophysical and electrochemical behaviors of the ferrocenyl-substituted pyrazaboles were found to be dependent on the nature and length of the spacer groups. The single crystal X-ray structures of ferrocenyl-substituted pyrazaboles 11a, 11b, and 11d were obtained, which reveals that the pyrazabole core exists in chair, planar, and boat conformations. The crystal structures show marvelous supramolecular interactions. The pyrazaboles 11a–11g show good thermal stability, which increases with the length of spacer. The computational study reveals donor–acceptor interactions in ferrocenyl pyrazaboles. The computational results show good agreement with the experimental results.
                                    本文报告了通过
钯催化的铃木和索诺伽希拉偶联反应设计和合成供体-受体-供体型
二茂铁取代的
吡唑。研究发现
二茂铁取代的
吡唑的光物理和电
化学行为取决于间隔基团的性质和长度。研究人员获得了
二茂铁基取代的
吡唑 11a、11b 和 11d 的单晶 X 射线结构,发现
吡唑核心存在椅状、平面和船状构象。晶体结构显示了奇妙的超分子相互作用。
吡唑 11a-11g 显示出良好的热稳定性,并且随着间隔物长度的增加而增加。计算研究揭示了
二茂铁吡唑中的供体-受体相互作用。计算结果与实验结果非常吻合。