417 



The platinum-salt of diethylene-triamine crystallizes in magnificent 

 golden-yellow needles of the composition 



C 4 H 16 N 3 Pt 3 Cl 9 = '* N 3 C1 3 , 3PtCl a . 



The platinum-salt of this, as well as of several other triammonias 

 which I have examined, cannot be recrystallized without at least 

 partial decomposition. New platinum-compounds are thus produced, 

 in some of which the chloride is united with a smaller number of 

 molecules of dichloride of platinum, whilst others, almost insoluble 

 in water, to judge from the enormous amount of platinum which they 

 contain, appear to be produced by platinic substitution. 



Not less definite are the results obtained in the analysis of tri- 

 ethylene-triamine, although, owing to the greater solubility of the 

 compounds of this base and its tendency to form imperfectly satu- 

 rated salts, the preparation of these substances presents greater 

 difficulties. The analysis of the free base has furnished numbers 

 agreeing with the formula 



which shows that this, like the diethylenated compound, is anhydrous. 

 It deserves to be noticed that the tendency to form definite hydrates, 

 so prominent in the diamines, is not met with in the case of the tri- 

 amines. 



I have examined numerous salts of triethylene-triamine, both tri- 

 atomic and diatomic, which confirm the formula of the base. In the 

 presence of a large excess of hydrobromic and hydriodic acids, this 

 substance forms well- crystallized triatomic compounds containing 

 respectively, 



Tribromide of C H N Br - [" (C ' ^ 



Triethylene-triammonium u **iS = [^ H 6 



Tri-iodide of C H N I - f^* H <V l I w 1 '"T 



Triethylene-triammonium **r <l VN ~ H 6 / 3 J 7* 



The solutions of these salts are powerfully acid. 



From feebly acid solutions, on the other hand, salts are deposited 

 in which only two equivalents of hydrobromic or hydriodic acids 

 are present. These substances contain 



