Friedel and Crafts on the Ethers of Silicic Acid. 389 
Mixed methylic-silicic ethers—Where the chlorhydrines are’ 
treated with an alcohol, they exchange the Cl, for the radical of 
the alcohol and 8, and in this manner, by employing sabres 
alcohols, mixed normal ethers may be obtained. ' Ord nary al- 
cohol reacts immediately on the dionodhloneydtie with ola: 
tion of HCl, and the principal product is trimethylic mono- 
ethylic-silicic hak No chlorhydrine remains undecomposed, 
and there is no formation of silicate of ethyl, and after the ex- 
cess of alcohol has distilled, the liquid commences to boil at 
133°. There is also a small quantity of a product with a boil- 
ing point which corresponds to that of the dimethylic diethylic 
ether formed. 
The product boiling at 183°-135 gave on Ot ee 
I. Substance, Seat - - 0:2890 gr. 
sid., - Siege, ae, tee A 
a tea weight, - - . - 0°2450 * 
a eS Oe iy 
HG; +) a Se 01885 “ 
I, a Si(CH,)a(E3 all)2O« 
C, 36°03 
i, 8°55 " is 
1, 17°14 16°86 
es density of the liquid at 0°=1:0280. 
order to explain to ourselves the formation of the di- 
width ylis diethylic silicic ss we examined the alcohol, which 
distilled after the completio of the reaction 
It distilled in great pa, at 72°-74°. It was treated with 
powdered caustic potash to remove the hydrochloric acid it con- 
tained in solution, distilled and then ps over night in contact 
with freshly calcinated carbonate of potash. 
An analysis of this alcohol gave, 
Substance, nae - - : - , 01995 gr. 
8., iO ee baer S000 * 
HG, ce ee s - onago 
€H,9. €,H,0. 
C, 40°94 37°5 52°17 
12° 13°04 
Common ethylic alcohol containing 21 p.c. of water would 
have the composition ; but we ascertained that, when aque- 
ous alcohol was treated in the same way with carbonate of 
ash, it marks 96 p. et. on the alcoholometer of Gay-Lussace. 
alcohol contained a certain quantity of methylic alcohol, a eek 
could only have been formed by direct elimination from the me- 
