110 PEOPIONE. 



Methylchloracetol (Acetone-chloride), C 3 H 6 C1 2 = 

 CH 3 .CC1 2 -CH 3 . Is produced by the action of phos- 

 phorus chloride on acetone. Colorless liquid, boiling 

 at 69. Treated with alcoholic potassa or ammonia, it 

 is converted into monochlorpropylene C 3 H 5 C1. 



Methylbromacetol (Acetone-bromide), CWBr 2 = 

 CH 3 .CBr\CH 3 . By the action of phosphorus bromide 

 or phosphorus chlorobromide (PCl 3 Br 2 ) on acetone. 

 Colorless liquid, boiling at 113-116; specific gravity, 

 1.815 at 0. 



Moiiochloracet one, C 3 H 5 C10. Is produced when an 

 electric current is conducted through a mixture of ace- 

 tone and hydrochloric acid ; and by the action of hypo- 

 chlorous acid on monochlor- or monobrompropylene. 

 Colorless liquid, exciting to tears ; boiling point, 119. 



Dichloracetone, C 3 H 4 C1 2 0. Is produced by satu- 

 rating acetone with chlorine. A liquid, boiling at 

 120. With phosphorus chloride it yields 



Dichloracetone chloride, C 3 H 4 C1 4 . Heavy liquid, 

 boiling at 153. 



By the action of bromine and chlorine-iodide on 

 acetone, there are produced bromine and iodine substi- 

 tution-products. 



Sulphacetone, C 6 H 12 S 2 . Is produced by the action 

 of phosphorus trisulphide on acetone. Yellowish 

 liquid, of a very unpleasant odor ; boiling point, 183- 

 185. Does not mix with water. 



2. Propione (Diethylketone). 

 C 5 H 10 C 2 H 5 .CO.C 2 H 5 . 



Formation and preparation. By destructive distil- 

 lation of propionates; or by the action of zincethyl 

 on propionyl chloride ; further, by bringing together 

 sodium ethylate and carbonic oxide; by oxidizing 

 diethoxalic acid with potassium bichromate and dilute 



