[{"from": "human", "value": "Could you give me a brief overview of this molecule? [CH1-1][C][=C][C][=C][Ring1][Branch1].[CH1-1][C][=C][C][=C][Ring1][Branch1].[Ni+2]"}, {"from": "gpt", "value": "The molecule is a dark green colored, crystalline, inorganic compound that produces toxic gases upon heating. Nickelocene is used as a catalyst and as a complexing agent. Exposure to this substance can cause severe dermatitis, skin and asthma-like allergies and affects the lungs, kidneys, gastrointestinal tract and neurological system. Nickelocene is a known carcinogen and is associated with an increased risk of developing lung and nasal cancers. (NCI05)"}]