106 



Treatment of the product of digestion with water removes the 

 dichloride of ethylene- diphenyl-diammonium, the diethylene-diphe- 

 nylamine remaining dissolved in the excess of dibromide of ethylene, 

 from which it may be readily extracted by hydrochloric acid. 



Preparation of the substance in a state of purity, and comparison 

 of its properties with those of the body previously obtained, esta- 

 blished beyond a doubt the transformation, which resolves itself into 

 a simple process of substitution 



[(C.HJ"] " 

 2 (C 12 H e ) 2 N 2 

 H 2 



N 2 + (C M H a ), 



Br, 



Ethylene-diphenyl-diamine being a secondary diamine, it was not 

 without interest to replace the two remaining hydrogen- equivalents 

 by two monatomic molecules. On digesting the base with iodide of 

 ethyl some hours at a temperature of 100, a beautiful iodide was 

 obtained, crystallizing in well-defined prisms, difficultly soluble in 

 water, but more soluble in alcohol. 



This substance contains 



r(C4H 4 r 



C H N I = * ^ 5 ^ 2 ^ N 



Treatment with potassa separates from this iodide the base as a 

 crystalline body fusing at 70, and resembling in many respects the 

 previous base. It contains 



(c 4 H 4 



C 36 H a4 N 2 =(C 4 H 5 ) 2 lN 2 , 



and forms a beautiful platinum-salt crystallizing in needles of the 

 formula 



The deportment of phenylamine under the influence of dibromide 

 of ethylene gives a fair illustration of the nature of the substances 

 which are generated, under the influence of diatomic molecules, from 

 primary aromatic monamines. 



To complete the study of this subject, I have examined, moreover, 

 the action of dibromide of ethylene upon ethylamine, as a repre- 

 sentative of the monamines containing an ordinary alcohol-radical. 



