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 (C 3 H 3 Ag) 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 H 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 IPAg 2 .0 2 .(C 2 H 5 ) 2 . 



3. Crotonylene, 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 with 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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