[{"from": "human", "value": "Describe this molecule. [C][=C][C][#N]"}, {"from": "gpt", "value": "The molecule is a chemical compound of cyanide. It is used principally as a monomer in the manufacture of synthetic polymers, especially polyacrylonitrile which comprises acrylic fibers. Acrylic fibers are, among other uses, precursor for well-known carbon-fiber. It is also a component of synthetic rubber and small amounts may be used as a fumigant. It is one ingredient of cigarette. (L583)"}]