Unfortunately, the chemical equation you provided is incorrect. Specifically, Hg₃Pb₂, Hg₂Pb₂, Pb₂ are not recognized chemical substances. Also, this chemical equation does not adhere to the law of conservation of atoms.

Therefore, it is impossible to provide detailed information, reaction conditions, reaction process, and phenomena occurring.

Please check again the chemical formula and the chemical equation you want to explore.

Unfortunately, it seems the chemical equation you provided is incorrect. Hg₃Pb₂, Hg₂Pb₂, Pb₂, and O₂ are not valid chemical compounds. We cannot provide detailed information, reaction conditions, reaction process, or phenomena because this chemical equation does not exist.

Please recheck the information you want to know or provide a valid chemical equation.