What does bromination mean?
Bromination is a chemical process in which bromine atoms are introduced into a molecule, usually through a reaction with elemental bromine or a bromine-bearing reagent such as N-bromosuccinimide. As a cornerstone technique in organic chemistry, it belongs to the broader family of halogenation reactions and comes in several mechanistic varieties — electrophilic bromination of aromatic rings, radical bromination of alkanes, and addition of bromine across double bonds. Its enduring value lies in versatility: a carbon–bromine bond is reactive enough to serve as a synthetic handle, readily displaced by nucleophiles or converted into other functional groups, so chemists often brominate a substrate as an intermediate step toward more elaborate targets. Bromination also has practical industrial roles, notably in flame retardants and pharmaceutical intermediates. Because many brominating agents are corrosive or toxic, the term typically appears in controlled laboratory contexts rather than everyday speech, giving it a distinctly technical register.
nounA chemical reaction in which one or more bromine atoms are introduced into a compound, typically by treatment with bromine or a bromine-containing reagent.
- In chemistry: the process or reaction by which bromine atoms are introduced into an organic or inorganic compound.
- More broadly: any industrial or laboratory treatment involving the addition of bromine or a brominating agent to a substance.
"The chemist carried out the bromination of the aromatic ring under carefully controlled conditions."
"The electrophilic bromination of benzene requires a ferric bromide catalyst."
"Radical bromination of alkanes is far more selective than the corresponding chlorination."
Used mainly when referring to multiple distinct bromination reactions or procedures, e.g., in comparing different substrates or conditions.
"Both brominations proceeded cleanly at room temperature."
Bromination is the go-to trick chemists use to install a 'handle' on a molecule — a bromine atom that can later be swapped out for almost anything else, making it one of organic synthesis's most versatile moves.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bromination
Bromination derives from 'bromine', the name of the halogen element isolated in the 1820s by Antoine-Jérôme Balard, who coined it from the Greek 'brōmos', meaning 'stench', a reference to the element's sharp, unpleasant odor. The suffix '-ation' forms nouns of action from verbs, so bromination literally denotes 'the action of brominating'. Related words sharing this root include bromide, bromate, and the verb brominate itself.
Related word forms
How bromination is actually used
Bromination is technical vocabulary used almost exclusively in chemistry and related scientific fields; it is neutral in tone and appears in both British and American English without regional variation. In laboratory writing it often appears with a modifier specifying the mechanism, such as 'electrophilic', 'radical', or 'nucleophilic' bromination.
Easily confused with bromination
Chlorination introduces chlorine atoms into a compound, whereas bromination introduces bromine atoms.
Iodination adds iodine atoms to a molecule, while bromination adds bromine atoms; both are types of halogenation but use different halogens.