[{"from": "human", "value": "Provide a description of this molecule. [O][Cr][=Branch1][C][=O][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a monovalent inorganic anion obtained by deprotonation of one of the two OH groups in chromic acid. It is a chromium oxoanion and a monovalent inorganic anion. It is a conjugate base of a chromic acid. It is a conjugate acid of a chromate(2-)."}]