279 



and to distil, the larger portion undergoing decomposition. Among 

 the products of decomposition which are not yet sufficiently exa- 

 mined, considerable quantities of aniline make their appearance. The 

 results obtained in the analysis of ethylene- phenylamine lead to the 



formula 



C U H 9 N 



as the simplest molecular expression for this compound. 



This formula is confirmed by the analysis of the hydrochlorate 

 and of the platinum-salt, the preparation of which, on account of 

 their instability, requires some management. 



These salts contain respectively 



Hydrochlorate ......... C 16 H 9 N, HC1. 



Platinum-salt ......... C 16 H 9 N, HC1, PtCl 2 . 



The reaction which gives rise to ethylene-phenylamine is expressed by 

 the following equation : 



2C 12 H 7 N + C 4 H 4 Br 2 = C 12 H 7 N, HBr + C 16 H 9 N, HBr. 



Phenylamine. Bibromide Hydrobromate Hydrobromate of 

 of ethylene. of phenylanrine. ethylene-phenylamine. 



What is the constitution of this new base ? This question could not 

 be answered without further experiments, on account of the twofold 

 nature of bibromide of ethylene. In many cases this remarkable 

 compound exhibits the character of the hydrobromic ether of a 

 biacid ethylene-alcohol, of (C 4 H 4 )"Br 2 , whilst in the majority of re- 

 actions it splits into hydrobromic acid and the bromide C 4 H 3 Br, 

 which might be considered as the hydrobromic ether of a monacid 

 alcohol, C 4 H 4 O 2 , homologous to allylic alcohol. It remained there- 

 fore uncertain whether the new basic compound retained the original 

 molecule (C 4 H 4 )" replacing 2 equivs. of hydrogen, or the modified 

 molecule C 4 H 3 replacing 1 equiv. of hydrogen. In other words, it 

 had to be established by further experiments, whether the base was 



- cHN - or 



C 4 H 3 



C 12 H 5 N = C 16 H 9 N. 



The deportment of the substance with iodide of methyl and ethyl, 

 which immediately will be mentioned somewhat more in detail, has 



