Formation and PMR spectra of arene dipositive ions

Abstract

Abstract Perylene, naphthacene, anthracene and some substituted anthracenes are oxidized to the dipositive ions by SbF 5 (neat or in SO 2 CIF). In FSO 3 H‐SbF 5 dication formation takes only place with the easily oxidizable arenes perylene and naphthacene. The dication of anthracene has also been obtained by bromide abstraction from 9, 10‐dibromo‐9, 10‐dihydroanthracene. The PMR spectra of the dications are reported. Like in the dianions, the sum of the charge‐induced shifts varies considerably from one arene to the other.