Friedel and Crafts on the Ethers of Silicic Acid. 841 
was prepared, and we. found ethylic alcohol mixed with the por- 
tion of methylic alcohol, which distilled 73°~77°. 
I. Substance, weight, - - . . 0°1710 gr. 
Oa eH * eee, ee 
HO yr = sacs we tania 
II. Substance, weight, - . - - 01545 “ 
COs, - - - - - 0°2520 “ 
HyGres she vobtowyt 6 i oe 
‘ te €H, 90. G,H,0. 
C, 44°34 44°51 37°5 52°17 
H, 12°69 12°89 12°5 13:04 
bon and hydrogen found in the analysis of the monomethylic 
triethylic silicic ether. 
Dimethylic diamylic silicic ether—In the reaction of amylic al- 
cohol on the monochlorhydrine of methylic ether, the displace- 
ment of one alcoholic radical by another was still more strongly 
marked, for the principal product was a liquid boiling at 225°- 
235°, which did not have the composition of the trimethylic 
monoamylic ether, but very nearly that of the dimethylic di- 
amylic ether. 
n analysis of this product gave— 
I. Substance, weight, - - - - 0°2425 gr. 
age * an a ~ - - 04780 “ 
Hype i ek eats ee Te * 
II. Substance, weight, - - - - 0°3795 “ 
Oi Se ee ee eee, * 
z i Theory. 
I. ul $i(€H,).(€,H, ,).0,.- 
C, 53°76 54°55 
i, 10°89 10°61 
Si, 10-64 10°61 
The decomposition of this ether cannot be effected by an al- 
coholic solution of ammonia, and it is necessary to employ an 
alcoholic solution of soda for the determination of the silica, 
It should be noticed, that action of an alcohol upon an ether 
readily at the moment of the formation of the ethers from a 
Am. Jour. Sc1.—Szconp Series, Vou. XLII, No. 129,—May, 1867. 
44 
