The aromaticity of cyclic molecules is one of the most frequently mentioned properties in modern organic chemistry, and numerous studies have long been conducted on it. Aromaticity is not a property that can be observed experimentally, and there is no strict physical definition. Chemists commonly explore molecular aromaticity through a variety of indicators proposed based on different physical ideas or empirical rules. Electron counting rules were first used to assign aromaticity character in π conjugated systems, the most important being Hückel's rule which suggests that planar molecules with (4n + 2)π/4nπ electrons are aromatic/anti-aromatic.