a system of alternating single and multiple bonds that allows for the delocalization of electrons along the molecule, resulting in unique electronic and optical properties.
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2,2'-dibromo-5,5'-diphenyl-4,4'-di-tert-butylbiphenyl
3-chloro-4-iodobenzonitrile
4″-(diphenylamino)-[1,1′:4′,1″-terphenyl]-4-carbaldehyde
9-(9-heptadecanyl)-2,7-diformylcarbazole
[RuVI(5,10,15,20-tetrakis(4-methylphenyl)porphyrinato(2-))O2]
