[{"from": "human", "value": "Could you provide a description of this molecule? [C][=Branch1][C][=O][O-1].[C][=Branch1][C][=O][O-1].[Ni+2]"}, {"from": "gpt", "value": "The molecule is an odorless green solid. Sinks in and mixes with water. (USCG, 1999)"}]