Conjugated system
In chemistry, a 'conjugated system' is a system of connected p-orbitals with delocalized electrons. Conjugated systems are created by several multiple bonds, each separated by single bonds. In general, conjugated systems may lower the overall energy of the molecule and increase how steady it is. They can contain lone pairs, radicals or carbenium ions. The compound may be cyclic, acyclic, linear or mixed. Molecules which have a conjugated system have special properties created by the greater sharing of the delocalized electrons among many atoms.