An organic compound formed when two carbonyl groups (C=O) from molecules are replaced by imino groups (C=N) connected through a nitrogen atom (N-N).
From 'azo-' (azo dyes, from German) + '-ine' (Greek -ine, a chemical suffix for nitrogen compounds). Coined in the 19th century as chemists classified new organic compounds containing nitrogen double bonds.
Azines are nature's chemists' favorite playground—they show up in biochemistry, dyes, and pharmaceuticals, and they're one of the most common heterocyclic compounds organic chemists work with.
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