Two successive intramolecular condensations afford the trinaphthophenalenium cation 1, containing a C3h-symmetric new π system, as a dark violet solid. In this reaction a methoxy substituent in the precursor is used first for the activation of an aromatic carbon, second for the stabilization of the cationinc center formed during the first condensation, and finally as a leaving group.
No takes yet. Share an insight, caveat, or question.
Suenaga et al. (1998) studied this question.