CO 2 + C ⟶ 2 COHg 2 + → I − HgI 2 → I − [ Hg II I 4 ] 2 − 2 H 2 O 1 / 2 H 2 O ( 1 2 ) H 2 OnH 2 O {\textstyle {\ce {CO2+C->2COHg^{2}+->[I-]HgI2->[I-]{[Hg^{II}I4]^{2}-}2H2O1/2H2O(1/2)H2OnH2O}}}
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![{\textstyle {\ce {CO2+C->2COHg^{2}+->[I-]HgI2->[I-]{[Hg^{II}I4]^{2}-}2H2O1/2H2O(1/2)H2OnH2O}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/f292c3404087c4d86990759daf6fd229c202f188)