Silicon with Alcoholic Radicals. 817 
of ethyl in which the bromine was contained and takes u 
oxygen in its place. The reaction is probably represented by 
the equation : 
2Si(0,H,),C,H,Br+2KHO=0 | SUCH +2KBr+H,0+- GH, 
5 
When a small quantity of iodine is added to the bromine, 
bromid of ethyl is formed by their joint action upon silicic 
ethyd at 140°. 
he bromid of ethyl thus obtained, distilling at about 40°, 
was analyzed. 
I. Substance=0°6755 grms. ; CO,=0°5565 grms. ; H,0=0°2855 
grms. 
Calculated for C.HsBr. 
C=22°42 22°01 
H= 4-70 
Iodine is almost entirely without action upon silicic ethyd: 
2 equivalents of iodine were heated with one equivalent of 
silicic ethyd at 180° for 12 hours, very little iodhydric acid and 
hot a trace of iodid of ethyl were formed. It is well known 
that all the other ethyds, obtained by a reaction similar to that 
Which gives rise to silicic ethyd, are easily decomposed by 
lodine with the formation of iodid of ethyl. 
Tur Oxyp or Srticic TRI-ETHYD. 
I. Boiling-point =228°-230°. Substance=0-1970 grms. ; CO,= 
0-1495 .; H,0=0-2160 grms. Te 
IL. Same substance=0-2860 grins. ; SiO,=071345 grms. 
_ The determination of silicic acid was made by heating the 
liquid in a sealed tube with strong nitric acid. 
