2‐Triaxanemethyl Cation and 2,10‐<i>para</i>‐[3².5⁶]Octahedranedimethyl Dication

Abstract

A description as sets of nonclassical, unsymmetric, bridged bicyclobutonium ions fits the title ions 1 and 2. These are accessible by ionization of the corresponding methanol derivatives in superacidic media; the assignment of structure rests on ab initio calculations and on comparisons of experimental and calculated 13C NMR chemical shifts.