GLYCOLS. 143 



Propylene chlorhydrine, C 3 H 6 C1.0H, is prepared 

 like the analogous ethylene compound. Colorless 

 liquid, boiling at 127. When carefully ozidized it is 

 converted into monochloracetone (p. 110). 



Propylene bromhydrine, C 3 H 6 Br.OH. Colorless 

 liquid, boiling at 145-148. 



Propylene oxide, C 3 H 6 .0. Liquid, boiling at 35. 

 Combines with nascent hydrogen, forming isopropyl 

 alcohol. 



3. Butylene alcohol (Tetrylene alcohol), C 4 H 10 2 = 

 C 4 H 8 (OH) 2 , prepared from butylene (obtained from 

 amyl alcohol), is a colorless, inodorous, thick liquid, of 

 specific gravity 1.048 at ; boiling point, 183-184 

 mixes with water and alcohol in all proportions. 



A substance isomeric with this 



o 



Butyleneglycol, C 4 H 10 2 = CH 3 .CH.OH.OH 2 .CH 2 .CH. 

 Formed in small quantity, together with ethyl alcohol, 

 by treating aldehyde, very much diluted with water, 

 with sodium-amalgam, in a weakly acid solution. 

 Clear, viscid liquid, of a sweet, slightly pungent taste; 

 boiling point, 203.5-204. When oxidized, it yields 

 carbonic, acetic, and oxalic acids, and crotonic alde- 

 hyde, the latter in very small quantity. 



4. Amylene alcohol, C 5 H 12 2 = C 5 H 10 (OH) 2 . Fromamy- 

 lene bromide. Colorless liquid ; does not mix with 

 water ; specific gravity, 0.987 ; boiling point, 177. 



5. Hexylene alcohol, C 6 H 14 2 = C 6 H 12 (OH) 2 . From 

 hexylene bromide. Colorless liquid ; mixes with water; 

 specific gravity, 0.967 ; boiling point, 207. 



The two following compounds are isomeric with 

 this 



Diallylhydrate, C 6 H 14 2 = C 6 H 12 (OH) 2 . The iodide 

 of this alcohol C 6 H 12 I 2 , a thick liquid that does not 

 boil without undergoing decomposition, is produced 



