Friedel and Crafts on the Ethers of Silicic Acid. 333 
Sihcates of methyl—When we commenced our research, we 
tried the reaction of methylic alcohol on the chlorid of silicium ; 
but like Ebelmen* we only = 9 a oe that it phew im- 
possible to purify, turning bro n the air and poss 
~<a odor. We noticed, that shi peace sine vontainedk i 
_After having observed that the radicals contained in ie gee 
s may replace those contained in the ethers of acidst w 
Cancht that this reaction might furnish a method of obiing 
the silicate of meth 
With this object, we purified wood-spirit by a treatment with 
chlorid of calcium, and after decomposing the chlorid of calci- 
um compound with water and rectifying the alcohol several 
times with sodium, we sealed it in a tube with silicate of ethyl, 
and heated the mixture during 20 hours at 210° 
After several fractionated distillations oe principal product, 
isolated from the contents of the tube, was a liquid boiling at 
143°-147°, together with products with a " aitah higher boiling 
point. 
The portion boiling at 143°-147° gave on analysis numbers 
which correspond with the composition of a mixed silicate di- 
ethylic dimethylic silicic ether. 
Substance, weight, - - - - 08035 gr. 
ay SIM ae Oconee i 0°4320 “ 
Hey ck ciel oe gsi ee ee 
I. a weigh, - . - -  0:3450 
Sid,, ei ee OO 
Til. Produst reditila, 19°14 
Substance, we ight wo = ERO: * 
aes - - . - 0°3250 “ 
H,9, H - 01840 * 
IV. Another enpion portion dstiling, pad Or r 
Substance, weg > 900 “ 
be : i aE. Pass a 
H.0,. - ‘ Fr ie - - 0°2350 “ 
y Theory. 
Il. Si€,H,,O,4 
C, 38°90 39°89 40°61 40°00, 
’ 8:94 9°20 9°00 8°88 
ae 15°51 15°55 
It is piece pert oe that in these = ne on Boies pro- 
_ duct formed, and the only one that was easy to , was this 
mixed ether, and not the silicate of methyl or be pater 
mono-ethylic ether, although the methylic alcohol was used in 
large excess. 
_ * Ann, de Chim, et Phys, [3], xvi, 129. + This Journal, [2], x1, 34. 
AM. Jour. Sc1.—Seconp SzRizs, Vou. XLIII, No. 129,—Mar, 1867 
43 z 
