“…Pentalenes are 8π-antiaromatic polycyclic hydrocarbons (PAHs) used as active organic optoelectronic materials (e.g., OLED and OFET), semiconductors, and ligands in transition metal complexes. Since 1912, numerous studies have explored the dibenzopentalene (DBP) structures and characterized their physical properties because of their interesting antiaromatic properties, paratropic current, extended π-conjugation, and narrow HOMO/LUMO energy gap . The molecular framework of DBPs, such as dibenzo[ a , e ]pentalene, dihydrobenzo[ a , e ]pentalene, and dibenzo[ a , f ]pentalene, has a benzene ring annulated on the pentalene face (Scheme c).…”