Friedel and Crafts on the Ethers of Silicic Acid. 161 
cee co) id a con | : 
The reaction takes place somewhat less readily than the one 
which gives rise to the monochlorhydrine, and it is necessary to 
heat the sealed tubes longer and to separate the product by a 
larger number of fractionated distillation While manipulating 
the chlorhydrines the utmost ¢ my must be taken to prevent ex- 
a He cover ‘iting 4 air-tight. 
The dichlorhydrine boils at 186°-188°. Analyses gave: 
I, Substance, bes - . - - 0°3480 gr. 
ae a is ar Ja ows, ee 
TES Ss gs ee eine aio A  * 
II. Substance, weight, - - - - 0°7005 “ 
AgCl, - - - 
Ill. Substance, weight, - = - - -.. O°3250 * 
BiO,,.- 5. oe ee 
L. 
C, 25°62 * ates tees 25°39 
cl, oe 37°54 ae ERS 
Si, itt 14°35 14°81 
The vapor-density is 6°76; ehiecty 6545. Data: 
Difference of 2 wts. of bulb, 0°8695 gr. 
Temperature of balance, - 22° 
“ oil-bath, - 213° = Air thermometer 211°5 
Height of barometer, — - 766°9 mm 
Capacity of bulb, = - - 229°6 cc. 
Air remaining in bulb, - 0°3 ce. 
The density at 0° of the dichlorhydrine is 1-144. This body 
_ resembles the monochlorhydrine in all its physical properties 
The trichlorhydrine of silicic ed by heating for 
several hours at 150°, either the silicic ether or the two - 
ing chlorhydrines, with an excess of chlorid of silicium, and 
separating the products by a large number of fractionated 
tillations, e precautions that were taken to keep the other 
chlorhydrines from contact with moisture are still more 
sary in the case of the trichlorhydrine. It boils at 103°-105°. 
Analyses gave: 
I. Substance, weight, - - Se 0°3995 gr. 
Sig oS ng tS ee 
H.0,. 26: 2s 
