105 



water removes from this mixture a very considerable proportion of 

 hydrochlorate of phenylamine, leaving a brown resinous substance, 

 which gradually but imperfectly solidifies. This substance forms a 

 hydrochlorate which is difficultly soluble in concentrated hydro- 

 chloric acid, and which may be readily purified by repeated crystal- 

 lizations from boiling alcohol. The pure hydrochlorate dissolved 

 in water, and mixed with potassa or ammonia, furnishes the free base, 

 which generally separates as an oil, rapidly solidifying into a cry- 

 stalline substance. This may be further purified by repeated crystal- 

 lizations from diluted alcohol. 



Analysis, in fact, assigns to this body the formula 



C 28 H 16 N 2 =(C 12 H 5 )JN 2 , 

 H 2 



which was confirmed by the analysis of the dichloride 



F(<iri.),lN,jC] B 

 and of the platinum-salt 



r(c' 2 H 4 5 ) 2 lN 2 lci 2 ,2PtCl 2 . 



H 4 J J 



The formation of the new body is obvious : 



5 JNlBrY 



"-3 ) -J / 



Phenylamine. Dibromide of Ethylene- Bromide of 



Ethylene. diphenyl- Phenyl- ammonium, 



diamine. 



This substance differs in its physical characters essentially from 

 the base containing 2 molecules of ethylene. The former is very 

 soluble in alcohol and ether, the latter being very difficultly soluble ; 

 its fusing-point is 59, the fusing-point of the latter being 157. 



In order finally to establish the relation between the body which 

 forms the subject of this note and the base previously described, it 

 remained to prove experimentally that the former, when submitted 

 to the action of dibromide of ethylene, may be readily converted into 

 the latter. Nothing is easier than to accomplish this transforma- 

 tion, which, in the presence of alcohol, is rapidly effected at the 

 temperature of boiling water. 



