Dr. Hofmauu on the History of the Monamines. 369 



and that it is formed by the union of 2 equivalents of amylamine 

 with bisulphide of carbon. 



2C,„H,3N + aS.,=C,,H,,N,S, 



Amylatnine. New compound. 



A glance at this formula suffices to characterize this compound as 

 amylsulphocarbamate of amylamine. 



|_(C,o H,,) H3 Nj J 



This view is easily confirmed by experiment. Addition of hydro- 

 chloric acid to the crystalline compound immediately separates an 

 oily liquid, which gradually solidifies, and the acid solution now con- 

 tains amylamine which may be liberated by potassa. The oily sub- 

 stance is obviously amylsulphocarbamic acid : it dissolves in ammonia 

 and in potassa ; mLxed with amylamine, it reproduces the original 

 crystalline compound. 



Experiments with ethylamine have furnished perfectly analogous 

 results. I have been satisfied to establish qualitatively the analogy 

 of the reactions. 



It is of some interest to compare the deportment of amylamine 

 under the influence of bisulphide of carbon with that of phenylamine 

 in the same conditions. If both bodies gave rise to similar changes, 

 we should expect in the case of phenylamine the formation of phenyl- 

 sulphocarbamate of phenylamine. But experiment has proved 

 that phenylamine immediately produces diphenyl-sulphocarbamide 

 (sulphocarbanilide), sulphuretted hydrogen being evolved — 



2(C,,H,N) + aS,=a„H,,N,S, + H,S,. 



Phenylamine. Diphenylsulpho- 



carbamide. 



Nevertheless it is extremely probable that further experiments 

 will establish a perfect analogy in the deportment of bisulphide of 

 carbon with amylamine and i^henylamine. Diphenyl-sulphocarba- 

 mide is probably the product of decomposition of a very unstable 

 phenylsulphocarbamate of phenylamine — 



C,, H,, N, S,=H, S,+C,„ H,, N3 S„ 



Phenylsulpho- Diphenylsulpho- 



carbaraate of carbamide, 



phenylamine ? 



while a more minute examination of the crystalline substance 

 obtained by the action of heat upon amylsulj)hocarbamate of amyl- 

 amine cannot fail to characterize it as diamylsulphocarbamide — 



C,, H,„ N, S,=II, S, + C.,, II,. N, S, ? 



V "v 



Aniylsu]i)liocarl)i- Diamylsulpho- 



mate of amylamine. carbamide. 



