Kinetically Stabilized Diarylpnictogenium Ions

The newly prepared and fully characterized stibenium and bismuthenium ions [R(ind)MesE](+) (E=Sb, Bi; R-ind=dispiro[fluorene-9,3 '-(1 ',1 ',7 ',7 '-tetramethyl-s-hydrindacen-4 '-yl)-5 ',9 ''-fluorene) were rigorously compared to the previously communicated phosphenium and arsenium ions (E=P, As) as well as the bis(m-terphenyl) pnictogenium ions [(2,6-Mes(2)C(6)H(3))(2)E](+) (E=Sb, Bi). It is demonstrated that the choice of the aryl substituents dramatically effects the molecular structures (e. g. the primary E-C bond lengths) and the electronic structures (e. g. the energy of the LUMOs).

Automated summary

This article compares the newly prepared and fully characterized stibenium and bismuthenium ions with previously communicated phosphenium and arsenium ions and bis(m-terphenyl) pnictogenium ions, finding that the choice of aryl substituents significantly affects molecular and electronic structures.