c2n2

C2N2, commonly known as cyanogen, is a chemical compound with the formula C2N2. It is best described as two cyanide groups linked by a carbon–carbon bond, giving a linear molecule with the approximate structure N≡C−C≡N. The molecule has a molecular weight of about 52 g/mol.

Cyanogen is a colorless gas at room temperature and pressure. It is relatively unstable and can decompose upon heating or exposure to light. Its properties make it a reactive intermediate in organic synthesis, and it has historically been used as a precursor to other cyanogen-containing compounds and nitriles.

Toxicity and safety are defining features of cyanogen. It is highly poisonous and can interfere with cellular respiration by inhibiting key enzymes. Because of its hazards, handling requires appropriate engineering controls, specialized equipment, and strict adherence to safety protocols. It is stored and transported as a regulated gas and is typically used only in controlled laboratory or industrial settings.

Uses and occurrence are mostly limited to specialized chemistry contexts. Cyanogen serves as a building block in the synthesis of nitriles and certain heterocycles and has been investigated in research on cyanogen-derived materials. Due to its toxicity and reactivity, it has largely declined in routine industrial use in favor of safer or more easily handled alternatives.

See also: cyanide, nitriles, cyanogen chloride.