422 



has led to the following formulae : 



r( c * H 4)3 U l T 

 Platinum-salt C ia H 32 N 3 Pt 3 C1 9 = (C 2 H 5 ) 3 L N 3 C1 3 , 3PtCl a , 



L H 5 j J 



T(G,H 4 ) 8 U ] -f 

 Gold-salt C 12 H 32 tf 3 Au 3 Cl 12 = (C 2 H 5 ) 3 I N, Cl 3 ,3AuCl 3 . 



L H 5 J J 



Whilst engaged in the study of the action of dibromide of ethylene 

 upon ethylamine, I occasionally observed among the bases of higher 

 boiling-points an alkaline compound remarkable for the insolubility 

 of its chloride in alcohol. By this behaviour it was easily separated 

 from all the other basic substances accompanying it. This base was 

 found to be 



Diethylene-diethyltriamine, C 8 H 21 N 3 = (C 2 H.) 2 Lit. 



H 3 J 



Among the salts of this base are some of the finest compounds 

 which have come under my notice in this inquiry. 



The chloride crystallizes in leaves of the lustre of mother-of-pearl, 

 very soluble in water, almost insoluble even in ordinary alcohol, in- 

 soluble in ether. It contains, 



Trichloride C 8 H 21 N 3 C1 3 = (C 2 H 5 ) 2 j C1 3 . 



_ The corresponding iodide is much more soluble, it was found to 

 have the composition, 



Tri-iodide C 8 H 24 N 3 I 3 



-(C 2 H 4 ) 2 U 1 

 (C 2 H 5 ) 2 K I 3 . 



H 6 J J 



To obtain this salt it is necessary to employ a great excess of 

 hydriodic acid. 



The ethylated ethylene-triamines exhibit the same tendency to form 

 diatomic salts which I have pointed out in describing the ethylene- 

 triamines themselves. A solution of diethylene-diethyltriamine just 

 neutralized with hydriodic acid deposits in fact a diatomic salt, 



The finest salt of this base is the nitrate. Readily soluble in hot, 

 and moderately soluble in cold water, it is deposited from a saturated 



