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By A. K. Holliday, G. Hughes and S. M. Walker (Auth.)

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Sulphur, at the base of the furnace, was heated and as the vapour rose through the red hot coke, it formed CS2 which escaped at the top. Other organic sulphur compounds are probably formed and are responsible for the foul smell of the CS2 produced. The kinetics of the formation of CS2 have been investigated100. The reaction is endothermic, AH = —22 kcal mole -1 , and therefore requires heat to keep it going. The reaction is also reversible and at high temperatures CS2 slowly decomposes. g. silica gel at 900°K or activated bauxite at 1000°K (p.

M. g. Ar, N2 at cryogenic temperatures with light of wavelength < 280 nm. Photolysis with light of wavelength >280nm produces the triplet species NCN 124 . The carbon atoms thus produced react readily with carbon monoxide125, fluorine126, chlorine and hydrogen chloride127 to produce the radicals CCO, CF 2 , CC12 and HCC1 respectively. )14C have been investigated. With ammonia at room temperature, the products are CH4, CH3NH2 and CH 2 NH 2 . All the CH 2 NH 2 and part of the CH3NH2 are only formed from energetic carbon atoms but the CH4 arises entirely from the reaction of carbon atoms that have been first thermalized128.

Williams, Proc. Roy. Soc. {London), A223 (1954) 2 5 1 . 210 L. B . Dashkevich, Russ. Chem. Rev. 35 (1967) 3 9 1 . ni have studied the photolysis of carbon suboxide in ethylene. Products were allene, methyl acetylene and carbon monoxide. The suggested mechanism of photolysis is: This mechanism was also proposed for thermal decomposition of carbon suboxide, the species C2O decomposing further to carbon monoxide and solid carbon. Polymerization212 of carbon suboxide is heterogeneous and dependent in extent on the surface of the vessel.

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