Bee 
Friedel and Crafts on the Ethers of Silicic Acid. 348 
III. (obtained by redistilling 181°-192°) 
Substance, boiling 183°-193°, weight, 0°2865 gr. 
ra 2 3 = - % = 0:458 “ 
2) 
sO, - = a ee ee 
IV. 192°-197° Substance, weight, - 02790 “ 
«i * 2 ne - - - 0°4400 
HO ys 5 8 ie ie hc ili 
Theory. 
i 1, Il. P Si(€,H,),(€.H, 0), 
C, 48°94 43°57 42:94 43°24 
H, 9°06 9:09 7:99 811 
Si, 12°80 12°61 
The decomposition of the acetine by the alcoholic solution of 
ammonia is not complete, and an alcoholic solution of soda must 
be used to make the silicic determination. 
The preceding analyses show, that the boiling point of the 
monoacetine Si, (©,H,),, ©2.H,O, O, must be near 190°; but 
we did not succeed in isolating a pure product by distillation. 
By the action of potash on the acetine, acetic acid is obtained, 
showing, that it is really an acetine, which is formed. The ace- 
tine is a somewhat oily liquid having an ethereal odor, with 
something of that of acetic acid in it. The odor of acetic acid 
becomes stronger, when the acetine has been exposed to the ac- 
tion of moisture. 
The product of another operation was distilled under a pres- 
sure of only 52 millimeters of mercury, because we feared, that 
the compound might be decomposed by distillation at a high 
temperature. The liquid boiling at 185°-145° was first analyzed 
(1). This was redistilled several times and the product boiling 
at 185°-140° was analyzed (11). 
I, Substance, weight, - - - - 04740 gr. 
1Og) a ee es ee 
II, Substance, weight, - - - -  0:4360 “ 
Re a ee ee ee 185 
: t IL. Theory. 
Si, 12°64 12°68 . 12°61 per cent. 
Action of Boric Acid on the Silicate of Ethyl.—In the hope of 
obtaining an ether containing boric acid and silicic acid together, 
we heated 8 grams of boric acid, which had been previously 
melted, with 28 grams of silicate of ethyl (2 molecules of borie 
acid for 3 of silicate of ethyl) during 12 hours at 240°. 
The whole of the acid dissolved, and on opening the tube 
there was no evolution of gas. ter six or eight fractionated 
distillations, products were obtained with a very high boiling 
point, and a considerable quantity of a liquid with a lower boil- 
Ing point; of this latter there distilled: 
