π-Stacked dimerization of an antiaromatic homoHPHAC monocation

Chem. Commun., 2026, Accepted Manuscript DOI: 10.1039/D5CC07392H, Communication Kaito Wada, Yuma Tanioka, Shigeki Mori, Hidemitsu Uno, Masayoshi Takase An antiaromatic homoHPHAC monocation unexpectedly forms a slipped π-stacked structure in solution and the solid state, representing a rare example of an antiaromatic π-dimer. In acetone-d6 at 298 K, the...