Carbon oxysulphide, decomposition

Thiolcarbonic Acid, HS.CO.OH, yields carbon oxysulphide, COS, by decomposition its esters yield alcohols or mereaptans when saponified, according to whether the alkyl group is attached to oxygen or to sulphur by this means the constitutions of the thiocarbonic acids are established. 

Applying to the case considered on p. 218 ot decomposition of carbon oxysulphide,... 

About 1865, E. Kopp, and P. W. Hofmann tried to revive the oxysulphide theory, but J. Pelouze refuted their arguments and after a long study of the reactions, J. Kolb confirmed A. Scheurer-Kestner s work, but concluded that in the main reaction the calcium carbonate loses its carbon dioxide by the action of the carbon dioxide in the fire gases. A. Scheurer-Kestner then showed that in this last conclusion J. Kolb is in error, because black ash can be made in crucibles without any assistance from the fire gases that the decomposition of the calcium carbonate, even in the presence of coal, requires a higher temp, than the reduction of the sodium sulphide and that black asb is obtained by directly heating sodium sulphide with calcium carbonate. 

Another oxysulphide, also a derivative of P205, was produced when HsS dissolved in P0CIs containing carbon disulphide was allowed to react for some weeks at 0° C. Small needle-shaped crystals having the composition P202S3 then separated. They melted at about 300° C. and sublimed in a vacuum with decomposition. The compound was decomposed by moist air with production of H2S. 

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