[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule appears as a colorless fuming liquid with a pungent odor. Flash point 57 \u00b0F. Boiling point 211.1 \u00b0F (99.5 \u00b0C). Vapor and liquid may cause burns. Denser than water. Vapors heavier than air."}, {"from": "gpt", "value": "[C][C][Si][Branch1][C][Cl][Branch1][C][Cl][Cl]"}]