[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an odorless yellow solid. Sinks and mixes with water. (USCG, 1999)"}, {"from": "gpt", "value": "[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[Na+1].[Na+1].[Na+1].[Na+1].[Fe+2]"}]