Siltcon with Alcoholic Radicals. 315 
the elements on zinc-ethyd, than the manner in which it acts 
with bromine and chlorine; thus far the only reaction known 
for such bodies is that in which the union between the alcoholic 
radical and the other element is severed, and the bromine or 
chlorine takes the place of the alcoholic radi 
The researches for instance, which have been made by several 
chemists* on stannic-ethyd, show that the action of bromine 
on that body is represented by the equation; Sn(C,H,),+Br.= 
Sn(CaH) Br+C,H,Br. We expect te ages similar reac- 
tion with silicic ethyd, and were surprised to find that the ethyl 
was held so strongly by the silicon, that it could not be re- 
moved by bromine or by chlorine, and that the only action was 
4 substitution of the bromine or chlorine for hydrogen in the 
organic radical. 
temperature; but when two atoms of bromine are heated in a 
bromi 
contents of the tube distil at 160°—260°, leaving a small quan- 
ba Fe carbonized matter as a residue. 
I. Boiling-point =230°-240°. Substance =0-2990 grms > €0,= 
04810 grms ; H,O0=0-2400 grms. 
IL. Boilling-point==290°-230°. Substance=0'8245 grms. ; CO,=: 
04920 grms ; H,O=0-2400 grms. 
Il. Same substance=0°6250 grms. ; AgBr=0%5051 grms. 
EE TEL: Calculated for SiCsHicBr.. 
65 
= 43'8 41:30 iis 48°65 
8 ja | 
Be sccxs a 38 35°87 
We suspected that the portion of the liquid having the highest 
boiling =. might contain a dibromated product, and, after 
8 distillation in vacuo, analyzed a body which distilled at 
°140°. : 
+ Frankland, es 329; cxi, p. 44. Buckton, 
ce d, Annalen der Chem. und Pharm., lxxxv, p. 329; : 
pid cit, p. 218; exii, p. 220; Cahours, Annales de Chim. et Phys, TI, lxi, 
