The question of an anion within an anion structure for corannulene tet
raanion is examined by ab initio and semi-empirical calculations, as w
ell as by the behavior of corannulene anionic intermediates in anhydro
us ammonia. Calculations do not lend much support to a central cyclope
ntadienyl anion in the tetraanion, and a tetraanion is either not form
ed or does not resist protonation in liquid ammonia.