conditions. The crystal structures were determined and are consistent with the presence of a stable N–N bond, which can be cleaved by hydrogenation. Both experimental and computational studies suggest a covalent bonding character of the N–N bond, with diminished aromaticity of the newly formed pyrazolium ring due to the quaternary ammonium atom (N1), in contrast to the aromatic character of the parent
通过分子内亲电胺化反应在温和的条件下合成了1,1-二取代的
吲哚鎓
六氟磷酸盐。确定了晶体结构,并与存在稳定的N–N键相一致,该键可以通过氢化作用裂解。实验和计算研究均表明,N–N键具有共价键特征,而由于季
铵原子(N1)而使新形成的
吡唑环的芳香性降低,而母体
吲唑则具有芳香性。