336 Friedel and Crafts on the Ethers of Silicic Acid. 
The normal silicate of methyl is a colorless liquid, possessing 
an etheric and rather agreeable odor. It is soluble in conside- 
rable quantity in water, and the solution cally gives a gelatinous 
deposit of silica at the end of some weeks. Moisture or aque- 
ous alcohol decomposes it rapidly with formation of condensed 
products and iar tely of silica. It burns with a white smoke 
duotiepostil of silic 
examethylie disilici ether is formed, whenever the normal 
ether is prepared with aqueous alcohol, and it ma 
tained by heating the normal — with methylic alcohol con- 
taining water. It boils, as we have already said, at 201°-202°°5 
and resembles the hexethylic disilicic ether very much in its 
properties. 
An ge Gi gave— 
see 
ubstance, wake - - - - 02880 gr. 
o,, > Se ee Oe 
H 0; - < - - - 0°1800 “ 
IL oS weight, - - - - Cakes * 
2665 
I. tos remaiifag in the bulb after the aessehuniie of 
the vapor-density. 
oe i it. - - - - 0°3335 gr. 
€0,, + (968? chesieeids aes 
Biche: <a ict ee Galt aye a ED 
Theory. 
: III. Si,(€H,),8, 
C, 28°04 27°80 27°90 
H, 6°95 6-99 6-97 
$i, 00 21°70 
The vapor density a 19. The theory requires 8°93. 
Difference of 2 weights of bulb, - 1:2422 gr. 
Temperature of beat 24° 
ir-bath, < 266°5 mercury therm. 
a 263° air thermometer. 
Barometric biiat eee ee 
Capacity of bulb, - - 25325 ce. 
ir remainin 0°2 ce. 
The density of this ee at t 0°=1- 144. 
We have not succeeded in isolating any product of a definite 
composition with a boiling point higher than that of the ee 
methylic disilicic ether, gad the result of our experiments 
pre: exactly oe @ same as in the case of the ethylic oes ta 
lers. 10 “centage amount of silicic acid rises wi 
boiling point, Pe did not extend our investigations so far as 
was done with ethylic ethers, 
e call attention to the nial difference in the oma points 
of the poe and ethylic normal silicate =44°, only 11° for 
