[{"from": "human", "value": "Provide a description of this molecule. [C][#Branch1][C][#N][Hg-2][Branch1][Ring1][C][#N][Branch1][Ring1][C][#N][C][#N].[K+1].[K+1]"}, {"from": "gpt", "value": "The molecule appears as a colorless crystalline solid. Denser than water. Toxic by inhalation and ingestion. Produces toxic oxides of nitrogen during combustion."}]