M. Wartz on Derivatives of Glycol. 123 
soluble in water, alcohol, and ether. Repeated analyses and a 
vapour-density determination gave for it the formula €* H'° 0°, 
and its formation may be thus expressed :— 
2 yi4 2 Fy4 
1¢ Hef 0°) +e HB =2 (© . 2) + C1119 034 H20, 
ly Bromide of New body. 
Glycol. ethylene. Br 
Hydrobromic glycol. 
In its composition it is intermediate between glycol and the ether 
of glycol ; it may be represented as two molecules of glycol united, 
with the elimination of an atom of water : 
2 yI4 
G fet Q? C2 H4 
=H?0+4€? H* -0°. 
¢ if Q2 Hi? 
H?2 
Wurtz* has published some additional researches on oxide of 
ethylene. Oxide of ethylene has the properties of a base; it 
combines directly with hydrochloric acid to form hydrochloric 
glycol : 
G2 H4 0 
HO+@WO=CHAHCIO= H ; ; 
Oxide of Cl 
ethylene. Hydrochloric glycol. 
It also combines directly with acetic acid to form the acetate of 
glycol. 
It combines with water to regenerate glycol. The two sub- 
stances are heated together in a sealed tube. The product of the 
action has a saccharine taste. On distillation, glycol first passes 
over, and the temperature rises to about 210°. The distillate 
then consists of the intermediate ether of Lourengo above de- 
scribed. Its formation and that of glycol are expressed by the 
reactions : 
€?H40+4 H?20 = CG? He Q?, 
Oxide of Glycol. ~ 
ethylene. 
2(€2 H4 0) + H20 =CtH19 0, 
Oxide of Intermediate 
ethylene. ether. 
Wurtz points out that this intermediate ether bears to glycol and 
oxide of ethylene the same relations as Pelouze’s anhydrous lactic 
acid does to lactic acid, and to lactide. 
* Bulletin de la Soc. Chimique, p. 79. 
