279 



Nor is this doubt removed by the formation of ammonias of more 

 advanced substitution. I have never succeeded in limiting the 

 substitution to one equivalent of hydrogen in the case of diamines ; 

 the residual hydrogen in each of the linked ammonia-molecules is 

 invariably affected in the same manner. Thus the action of iodide 

 of ethyl upon the ammonia under consideration will produce two 

 volatile bases, 



(C a H 8 )j>N or (C;H 5 )JN 2 , 

 H 



R 



(C 2 H 5 UN or 



(C 2 H 5 )J (C 2 H 5 ) 2 



the atomicity of which is as uncertain as that of the body from which 

 they are derived. 



It is in the transformation of the ammonia into an ammonium- 

 compound by the action of iodide of ethyl that the true nature of the 

 substance is revealed. A monamine, thus treated, yields only one 

 compound, 



(C 



R ^l 

 ,H B )I N 



^ N 



C 2 H 5 ) 



whilst a diamine gives rise to two compounds, viz. : 



:*; 



I; 



ASS 



_(C 2 H 5 )H 



NjL 



and 



:c 2 H 5 ) 2 



:c 2 H 6 ) 2 



_(C 2 H 5 ) 2 



N., 



The first of these compounds is always formed when the secondary 

 diamine is submitted to the action of iodide of ethyl. In this 

 case two independent reactions are accomplished side by side. The 

 first one transforms the diethylated diamine into a tetrethylated 

 (^ammonium-compound, 



(C 2 H 5 ) 

 (C 2 H 5 ) 2 



The second reaction gives rise to a pentethylated diammonium- 



