Annulenes are an intriguing class of organic compounds that possess distinctive electrical characteristics and aromaticity due to their cyclic structure ... Annulenes are an intriguing class of organic compounds that possess distinctive electrical characteristics and aromaticity due to their cyclic structure of conjugated double bonds, frequently with alternating single bonds. Because of their striking influence on physical attributes and chemical reactivity despite their simple structural makeup, these molecules are of great interest in organic chemistry.An annulene's π-electron system, which circumscribes the ring continually, is its defining characteristic. If specific conditions are satisfied, this conjugation results in delocalized π-electrons that stabilize the molecule and frequently confer aromaticity. Hückel's rule, according to which a molecule is aromatic if it has a planar, monocyclic ring with 4n + 2 π-electrons (where n is an integer), describes the aromaticity of annulenes. This rule aids in predicting the reactivity and stability of different annulenes. Smaller rings, like cyclobutadiene (4 π-electrons, antiaromatic), can be found among annulenes, as can larger rings, like benzene (6 π-electrons, aromatic), and so on. Their chemical characteristics are significantly influenced by the ring's size and substitution pattern. For instance, because of their higher aromatic stabilization, larger annulenes frequently show more stability, whereas smaller rings may be quite reactive because of their antiaromatic nature.Annulenes' electrical structure determines how reactive they are. These substances are capable of a wide range of chemical reactions, such as ring opening reactions, nucleophilic or electrophilic additions, and, in some situations, polymerization. Antennes are versatile building blocks in organic synthesis because of their capacity to modify their structure or substitute another element, hence modulating their reactivity. Using computational techniques, annulenes have been thoroughly investigated from a theoretical standpoint in order to comprehend its electronic structure, aromaticity, and spectroscopic characteristics. These investigations advance our knowledge of conjugated systems and offer guidance for creating novel materials with specific electrical characteristics.Annulenes and their derivatives are applied in medicinal chemistry to create novel pharmaceuticals with targeted biological activity, as well as in organic electronics, where their semiconducting properties are utilized. Annulenes are intriguing prospects for upcoming technologies due of their tunable electrical and structural characteristics. To sum up, annulenes constitute a rich field of research in organic chemistry that combines useful applications in materials science and medication development with basic principles of aromaticity. They possess special electrical properties due to their cyclic, conjugated structure, which keeps scientists intrigued and spurs advancements in organic chemistry.