An organic compound consisting of a naphthalene molecule (a two-ring aromatic hydrocarbon) with one or more bromine atoms attached, used as a heat transfer fluid and chemical intermediate.
From bromo- (bromine) + naphthalene (from naphtha, an ancient name for petroleum-like liquids, plus -ene for hydrocarbons). Created as chemists began synthesizing halogenated aromatic compounds.
Bromonaphthalenes are fascinating because naphthalene's two-ring structure creates multiple positions where bromine can attach, leading to different isomers with distinct properties—a concept that taught chemists how position matters as much as composition.
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