What is extended conjugation?

Extended conjugation refers to a system in which multiple alternating single and double bonds in a molecule allow for delocalization of π-electrons over a larger region. This phenomenon typically occurs in conjugated systems, such as polyenes and aromatic compounds, enhancing their stability and influencing their optical and electronic properties. Extended conjugation can lead to unique characteristics like increased color intensity in dyes and improved conductivity in organic materials. Overall, it plays a crucial role in various chemical and biological processes.