N -2,6-Di(isopropyl)phenyl-2-azaphenalenyl radical cations.

N -2,6-Di(isopropyl)phenyl-2-azaphenalenyl radical cations were obtained as a dark brown air-sensitive crystalline compound. The high HOMA values and the ACID calculation indicate relatively high aromatic character of a 5,8-di- tert -butyl derivative, and clean generation of a derivative without tert -butyl groups indicates that the di(isopropyl)phenyl group is sufficient for hampering the formation of the σ-dimer.