Reactions of phosgene with Group 16 oxides

Sulfur dioxide reacts with phosgene (see also Section 4.7.5.3) in the liquid phase (autoclave) at between 200 and 400 C (optimally 250 C) according to [364a,918a]  

A similar reaction is reported to occur in the gas phase, with an excess of sulfur dioxide in the presence of an activated charcoal catalyst, between 280 and 350 C [685b]. Reaction in the gas phase, catalysed by charcoal, at 300 C generates by-product SCl [364a,918a]  

These reactions also produce by-product S2CI2. because SCI, breaks down to S2CI2 and Cl2 [364a,ICI31]. 

The reaction of SO with phosgene has been operated on an industrial scale to produce SOCI2, by passing a mixture of the two gases (SO 2 in a slight excess) over coconut 

Phosgene (0.1-1.5 wt.%) Is reported to stabilize liquid sulfur trioxide against 

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