64 DERIVATIVES OF ETHYL ALCOHOL. 



base, saponifies fats, expels ammonia from its salts, 

 precipitates solutions of metallic salts, and forms with 

 acids neutral crystalline salts. 



Tindiethyl, (C 2 H 5 ) 2 Sn, is formed, together with tin- 

 triethyl, when ethyl iodide is brought together with 

 an alloy of 1 part of sodium and 4 parts of tin. Yel 

 low, oily liquid, not volatile without decomposition ; 

 unites with oxygen, chlorine, bromine, and iodine. 

 Tindiethyl iodide (C 2 H 5 ) 2 SnI 2 is formed when tin and 

 ethyl iodide are heated together. It forms needly crys 

 tals, which fuse at 44. 5 and boil at 245, are soluble 

 ?n ether and hot alcohol, only with difficulty soluble 

 in water. Zinc precipitates tindiethyl from its solu 

 tions. Alkalies precipitate tindiethyl oxide (C 2 IP) 2 SnO; 

 white, amorphous powder; insoluble in water, alcohol, 

 and ether; soluble in an excess of caustic soda or 

 potassa ; combines with acids, forming crystalline salts. 



Tintetrethyl, (C 2 H 5 ) 4 Sn, is formed by heating tindi 

 ethyl and distilling tindiethyl iodide with zincethyl. 

 Colorless liquid, of specific gravity 1.187 ; boiling 

 point, 181. Does not unite with oxygen, chlorine, or 

 iodine. 



Tintriethyl, (C 2 H 5 ) 6 Sn 2 . Thin liquid, boiling at 

 265-270, but not entirely without decomposition ; 

 specific gravity, 1.4115. It absorbs oxygen and yields 

 with it an oxide (C 2 II 5 ) 6 Sn 2 0, volatile without decom 

 position, the hydrate of which is a strong base, con 

 sisting of colorless prisms fusing at 66 and boiling at 

 271, forming with acids crystalline salts. The iodide 

 (C 2 IP) 3 SnI is formed by direct union of tintriethyl 

 with iodine, by continued heating of ethyl iodide 

 with zinc-sodium (containing 2 per cent, sodium), and, 

 together with ethyl iodide, by the action of iodine 

 on tintetrethyl. A liquid boiling at 231 ; specific 

 gravity, 1.83. The further action of iodine resolves 

 it into tindiethyl iodide and ethyl iodide. The 

 chloride (C 2 IP) 3 SnCl is formed, together with ethyl 

 hydride, by the action of hydrochloric acid on tin 



