Carbon disulfide photochemical oxidation

Biogenic Sulfur Emissions from the Ocean. The ocean is a source of many reduced sulfur compounds to the atmosphere. These include dimethylsulfide (DMS) (2.4.51. carbon disulfide (CS2) (28). hydrogen sulfide (H2S) (291. carbonyl sulfide (OCS) (30.311. and methyl mercaptan (CH3SH) ( ). The oxidation of DMS leads to sulfate formation. CS2 and OCS are relatively unreactive in the troposphere and are transported to the stratosphere where they undergo photochemical oxidation (22). Marine H2S and CH3SH probably contribute to sulfate formation over the remote oceans, yet the sea-air transfer of these compounds is only a few percent that of DMS (2). 

Wright FL. 1960. Flash photolysis of carbon disulfide and its photochemically initiated oxidation. J Phys Chem 64 1648-1652. 

As it is shown above for many cases, dioxides, sulfide oxides and disulfides of carbon decompose upon irradiation into two carbene type fragments. They can recombine if a wavelength is used, which is absorbed by one of the fragments. According to the recombination of two molecules of CS it should also be possible to synthesize S=C=C=0 117, if CS is photochemically excited in the presence of carbon monoxide. 

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