GLYCOLS. 139 



poses it at 100, yielding water and qlycolchloracctin 

 C 2 II 4 C1.0.C 2 H 3 0, a liquid, boiling at 145. 



Ethylene diacetate, C 2 H 4 j Q OTTO is formed by 

 mixing dry silver acetate with ethylene iodide. A 

 liquid, boiling at 186, soluble in 7 parts water. 



Ethyleneamine bases. By the action of ethylene 

 bromide on an alcoholic solution of ammonia, the crys- 

 talline hydrobromates of the three bases: Ethylene- 

 diamine C 2 H 4 (NH 2 ) 2 , diethylenediamine (C 2 H 4 ) 2 (NH) 2 , 

 and triethylenediamine (C 2 H 4 ) 3 N 2 , are formed. These can 

 be separated from each other by means of crystallization. 

 From these salts the volatile bases can be set free by 

 means of silver oxide or by distillation with potassa. 

 They are liquid. Ethylenediamine, which can also be. 

 produced by conducting cyanogen into a mixture of tin 

 and hydrochloric acid, boils at 123. Its formula is 

 C 2 H 4 (lSrH 2 ) 2 + H 2 0, and it does not give off the water 

 even by repeated distillation over caustic baryta. 

 Diethylenediamine boils at 170; triethylenediamine 

 boils at 210. 



Oxethylamine bases. When ethylene oxide is 

 heated with aqueous ammonia, heat is evolved, and 

 a mixture of three bases is formed: Oxethylamine 



OH 2 OH 

 (C 2 H 4 .OH)NII 2 = 2 2 (i somer i c w ^^ aldehyde- 



ammonia), dioxethylamine (C 2 H 4 .OH) 2 NH, and triox- 

 ethylamine (C 2 H 4 .OH) 3 K Their hydrochlorates are 

 also produced when ethylene chlorhydrine is heated 

 with aqueous ammonia to 100. The difference in 

 the solubility of the hydrochlorates and the platinum 

 double salts of the three bases in alcohol affords a 

 means of separation. They are of a syrupy consistence, 

 easily soluble in water, strongly alkaline, and yield 

 crystallizing salts. 



Similar bases of more complicated constitution are 

 formed by the union of ethylene oxide or ethylene 



