Abstract
The titled new non linear non benzenoid quinone compounds of cyclohepta[a]phenalene-6,10-, -6,12-, -7,10-, and -7,12-diones have been synthesized. The dicationic species formed from quinones by protonation in a strong acid were revealed as diatropic compounds instead of a 16-pi electron system by an examination of spectral measurements, such as the 1H NMR and UV spectra. The stability of these quinones, dicationic species, and dianonic species electrically derived from quinones depends upon the positions of carbonyl groups with both steric and electronic factors.
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