Friedel and Crafts on the Ethers of Silicic Acid. 163 
I. (Boiling point 216°-225°.) Substance, wt, 0°2875 gr. 
es, asaAy 
5560 “ 
28, - 0-2620 « 
II. (Boiling point 223°-230°.) Substance, wt. 0°7015 * 
iO,,  - 01625 “ 
III. (215°-220°.) Substance, wt. 0°2215 “ 
€0,, -  0-4280 * 
4,9, a 2070“ 
IV. (215°-220°.) Substance, wt., 0°3845 “ 
i - 0°0940 “ 
Another preparation where an excess of amylic alcohol had 
been employed— 
V. (214°-220°) Substance, wt. 0°3795 gr. 
8., - 07480 “ 
Hv, - 0°3640 “ 
L Il. i. IV. v. Theo 
C,. 52°74 52°73 53°78 52°80 
H, 1013 10°38 10°75 10°40 
Si, 10°80 11-40 ; 11-20 
Analysis number v, and those of products boiling above 230°, 
indicated the presence of a mixed ether, containing more amyl 
than the one we sought to obtain. is fact awakened our at- 
tention, and induced us to make some researches on the action 
caustic soda in alcohol to make the determination of silica. 
Ebelmen made the same observation in regard to the silicate of 
amyl. Density at 0°=0°926. 
The mixed ether on distillation, even in vacuo, has a tenden- 
cy to decompose with formation of diamylic diethylic ether, and 
doubtless at the same time of normal ethylic silicic ether. 
product which had been prepared from the monochlorhydrine - 
Without an excess of amylic alcohol, after several distillations at 
00°-110°, under a pressure =3-5 millemeters of mercury, had a 
Seupoeno’ between that of the mono- and the di-amylic mixed 
ether. ie Baers 
Substance, weight, - = - 0°2805 gr. 
ee 
MgO, ee Oe 
* This Journal, xl, 34. 
