Reactions of phosgene with Group 12 elements

Dihydrogen does not react with phosgene thermally, even when subjected to an electric spark [467]. However, a mixture of Hj, and COClj (in the ratios 2 1 2) ignites expiosively, according to [467]  

At atmospheric pressure and ambient temperature, irradiation (mercury lamp) of a mixture of phosgene and dihydrogen induces reaction according to [269]  

The initial quantum yield for this process was determined as ca. 3.8 [1427]. At 10 C, slight traces of methanal, H CO, were detected, but there is little evidence to sustain the claim [269] of its intermediacy in the gas phase reaction. 

This rate law was accounted for by a simple mechanism (which has been queried [1074]) [1427]  

Phosgene has been investigated as a possible extinguisher for the dihydrogen-dioxygen system, and the explosion limits were plotted the explosions followed a normal course [2092], The addition of small amounts of phosgene (2.71%) to a dihydrogen-air flame will, however, reduce the flame speed [1396]. 

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