Silicon with Alcoholic Radicals. 313° 
i, IL. III. Calculated for C,H Br, 
C pies 13°35 13°42 12°76 
H He 247 2°35 2°12 
Br 84°43 chs awe 85°11 
The body is consequently the bromid of ethylene, and the 
gases, aed are formed during the preparation of silicie ethyd, 
are simply those which are known to arise from the decomposi- 
tion by means of heat of zinc-ethyd. 
The question suggests itself: are intermediate products, aris- 
ing from an incomplete replacement of chlorine by ethyl in the 
chlorid of silicon, also formed? Such products should have 
the composition: Si(C,H;),Cl; Si(C,H;)Cl,; Si(C2H,)Cl, and 
boi i iate betw °, the boilin 
should boil at points intermedia 
no more of a compound containing’ oxygen than was ordinarily 
ined i Z aration of silicic ethyd, and whose mode 
pam with which silicon retains its hold upon oxygen ren- 
ers this surprising. ; 
ieee p aso ef the reaction between amped 
and chlorid of silicon, is the one which gives = = eg re 
. 4d 
ds frees the crude silicic ethyd from ll 
foreign body, which is soluble in the acid. This body separates 
from the solution when the sulphuric acid is diluted with water, 
* Annales de Chimie et Pharmacie, cxv, 319. 
