ACETYLENE SERIES. 133 



the action of sodium on dichloracetone chloride (p. 

 110). Gaseous; produces a yellow precipitate in an 

 ammoniacal solution of copper subchloride; a white 

 precipitate (OTPAg) in an ammoniacal solution of 

 silver. Conducts itself towards bromine, iodine, and 

 hydriodic acid like acetylene. 



By the action of alcoholic potassa on monobrompro- 

 pylene bromide, tribrom- or trichlorhydrine (see Gly- 

 cerin), dichlorglycid, allylenbromide, and some other 

 similar compounds, is produced propagylic ether C 3 H 3 . 

 O.C 2 !! 5 , a liquid boiling at 72, which causes a yellow 

 precipitate in a solution of copper subchloride; in 

 solutions of silver, a white crystalline precipitate of 

 C 3 H 2 Ag.O.C 2 H 5 or C 6 H 4 Ag 2 .0 2 .(C 2 H 5 ) 2 . 



3. Crotonylem, C 4 H 6 . From monobrombutylene with 

 alcoholic potassa at 100. Liquid, boiling at 18. 



4. Valerylene, C 5 H 8 . From monobromamylene, like 

 crotonylene. Liquid; boiling point, 45. Gives no 

 precipitates in solutions of copper subchloride or of 

 silver. 



Propylacetylene (isomeric witlj valerylene), C 5 H 8 . 

 From methylpropylketone chloride (CH 3 .CC1 2 .C 3 H 7 ) 

 with alcoholic potassa. A liquid boiling at 50, which 

 gives a yellow precipitate in an ammoniacal solution 

 of copper subchloride, and a white precipitate in a 

 silver solution. 



5. Hexoylene, C 6 H 10 . From monobromhexylene. Boil- 

 ing point, 76-80. 



Diallyl, C 6 H 10 (isomeric with the preceding com- 

 pound). Is formed by the action of sodium on allyl 

 iodide, and by the distillation of mercurallyl iodide 

 (p. 120). Liquid, boiling at 59. 



The hydrocarbons, with a larger number of carbon 

 atoms, are produced in a similar manner. 



Alcoholic derivatives of these hydrocarbons are not 

 known. 

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