426 



only two other bromides, viz. the dibromide of ethylene-tetrethyldi- 

 ammonium and, lastly, the tetrabromide of triethylene-octethyltetram- 

 monium. The following equations represent the formation of these 

 compounds : 



iHJM -T 



i: x H Br ' 



and 



[//""* TT \ ii "\ ~i iv 



(C:H;>: IN, Br. 



The separation of these three salts presents no difficulties. Libe- 

 rated by oxide of silver and submitted to a protracted current of 

 steam, the mixture of bases separates on the one hand into diethyl- 

 amine and ethylene-tetrethyldiamine, which pass over with the steam, 

 and hydrate of triethylene-octethyltetrammonium, which remains 

 behind. 



The octethylated tetrammonium-compounds are remarkable for 

 their definite characters : they are still crystalline, a circumstance 

 which has facilitated their study in no common degree. The com- 

 position of the series was fixed by the analysis of the platinum-salt, 

 of the gold-salt, and of the tetriodide. The platinum-salt is almost 

 insoluble in water. Precipitated from a dilute and gently warmed 

 solution, it is obtained in small crystalline plates containing 



r(C 2 H 4 ) 3 Ji ] f 



C 22 H 64 N 4 Pt 4 C1 M = (C 2 H 5 ) 8 I N 4 C1 4 , 4 PtCl 2 . 



L H a J J 



This substance has served in the preparation of the other salts. 

 Treated with sulphuretted hydrogen, the platinum-salt is converted 

 into the difficultly crystallizable chloride, which yields with trichlo- 

 ride of gold a crystalline gold-salt of the composition 



r(c a H 4 ) 8 u ) 



C 22 H 54 N 4 Au 4 Cl 16 = (C a H 5 ) 8 [N 4 



H 2 J 



Cl 4 ,4AuCl 3 . 



The chloride, submitted to the action of oxide of silver, furnishes the 

 powerfully alkaline free base 



C H NO-K C > H *>' U ^ H > H " N J lT lo 



^22 " i> 4 VJ 4 JJ C ^4* 



