164. + Friedel and Crafts on the Ethers of Silicic Acid. 
I. Si, 8(€,H,),(€,H,,)O,.  Si,;2(Cgi,) 2(6,H, eg 
C, 5488 " 52°80 57°58 
H, 10°91 10°40 10:96 J 
Diethylic diamylic silicic ether was prepared in the same wa 
as the preceding by treating the dichlorhydrine with amylic al- 
cohol. The portion boiling at 245°-250° was analyzed. 
I. Substance, weight, - - - - 0:2115 gr. 
CO, St ese et ad 
pe a Seale = * = rs - 02095 “* 
II. Substance, weight, - . - - 0:3980 “ 
i - - - - - 0-0780 “ 
L Il. Theory. 
CG, 57°89 57°53 
H, 10°99 - 10°96 
1, 
The density at 0°=0-9150. 
Monoethylhie triamylic silicic ether was obtained in the same way 
as the preceding with the trichlorhydrine and amylic alcohol. 
It boils at 280°-285°. 
I. Substance, weight, - - - - 0°2410 gr. 
es ee igs ea ee ee ee 
FigO, ° 29°" Rah. 4 ae ree eee 
Il, Substance, weight, - - - - 0°4820 “ 
ay. Sy ee eee ee 
ii I. Theory. Si€,,H,,04- 
C, 60°51 61-08 
H, 11°18 11:37 
Si, 8°47 8°38 
This ether resembles in its properties the silicate of amy]. The 
density at 0°=0°913. 
these mixed ethers can only be prepared from the pure 
chlorhydrines, as they are decomposed on distillation, and there 
fore cannot be purified in that way. 
_Polysilicates of ethyl.Ebelmen describes, besides the normal 
silicate, two others, the one containing twice as much silicic acid, 
and the other four times as much, and calls them bisilicate and 
quadrisilicate of ethyl. 
He obtained the bisilicate, to which he gives the formula 
28i0,C,H,O (Si=7, C—6, O—8, H=1), 
treating the chlorid of silicium with alcohol containing one 
_ equivalent (16 per cent) of water. One equivalent of alcohol 
was added to two equivalents of chlorid. 
To quote his memoir, “when the product is distilled, the tem: 
perature of the liquid, contained in the retort, rises from 160 
to 350° without a considerable quantity of the product distilling. 
