60 DERIVATIVES OF ETHYL ALCOHOL. 



potassa ; when treated with silver oxide, gives silver 

 iodide and 



Phosphethylium hydroxide, (C 2 H 5 ) 4 P.OH. Crys- 

 talline, very deliquescent, strong base ; takes up car- 

 bonic anhydride from the air with avidity and forms 

 very deliquescent salts with acids. Is decomposed at 

 a high temperature into ethyl hydride and triethyl- 

 phosphine oxide. 



Triethylarsine, (C 2 IP) 3 As, is formed, together 

 with the following compound, when sodium arsenide, 

 mixed with sand for the purpose of lessening the 

 violence of the reaction, is distilled with ethyl iodide 

 in a vessel filled with carbonic anhydride. By careful 

 distillation of the oil which passes over, in an atmos- 

 phere of carbonic anhydride, triethylarsine distils 

 over first. Colorless liquid, strongly refracting, of 

 exceedingly disagreeable odor; specific gravity, 1.151 ; 

 begins to boil at 140 ; gives off fumes in contact with 

 the air, but takes fire only when heated. Combines 

 with oxygen, forming triethylarsine oxide (C 2 H 5 ) 3 AsO, 

 a colorless, oily liquid ; with sulphur forming triethyl- 

 arsine sulphide (C 2 H 5 ) 3 AsS, a beautifully crystallizing 

 compound. It combines with ethyl iodide, forming 

 crystals of arsenethylium iodide (C 2 H 5 ) 4 AsI, and this 

 gives with silver oxide arsenethylium hydroxide 

 (C 2 H 5 ) 4 As.OH, a white, alkaline, deliquescent mass. 



Arsendiethyl (Ethylcacodyl) c 2 ) 2 As ' Yel ' 

 lowish liquid, of a very disagreeable odor. Takes fire 

 spontaneously in contact with the air; boils at 190; 

 is heavier than water. Combines with oxygen, sul- 

 phur, chlorine, etc., with evolution of heat. Conducts 

 itself perfectly analogously to the methyl compound 

 ( P . 40). 



Triethylstibine (Stibethyl), (C 2 H 5 ) 3 Sb, is produced 

 when potassium antimonide is distilled with ethyl 

 iodide in a current of carbonic anhydride. Colorless, 



