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Darzens halogenation

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English Etymology Discovered in 1911 by Auguste George Darzens. Noun - en organic chemistry The chemical synthesis of alkyl halides from alcohols via the treatment upon reflux of a large excess of thionyl chloride or bromide (SOX2) in the presence of a small amount of a nitrogen base, such as a tertiary amine or pyridine or its corresponding hydrochloride or hydrobromide salt. en Bromine Chemical reactions Chlorine en eponyms