Formic ether for the second, and silici-formic anhydrid for the last. The 
Chemistry and Physics. 107 
mains white and metallic, and does not diminish in weight. The forma- 
tion of the hydric silicid may therefore be thus represented : 
(Sm), } 84)e=S+((e,n,), | Os) 
The gas thus obtained is not spontaneously inflammable, at the ordinary 
atmospheric temperature and pressure, But if into a small quantity of 
m 
Friedel and Ladenburg have also examined the white substance 
duced by the action of water on the inflammable chlorid. It was pre- 
pared by passing the vapor of this chlorid into water at zero. The pro- 
duct was washed with ice-cold water, dried, first in a vacuum over sul- 
une acid, and then in an oil bath at 150° to 180° C, and analyzed. 
The results give the formula Si,H,@,, from which the authors derive 
the rational formula SHO t @. Its production is expressed thus : 
SiHO ee 
(SiH)C1,).-++(H,®) cine t O+(HCl),. | 
These researches confirm the opinion originally advanced by Wobler 
that these compounds are analogo t t 
Prove the analogy of silicon and carbon. It will be noticed that the in- 
flammable chlorid (SiH)ClI, is similar te chloroform (€H)CI, ; that the 
compound ( ony, @,corresponds precisely to the tribasic formic ether 
25/3 ; 
of Kay (clr). | Og5 that hydric slicd SiH, is analogous to hydric 
2578 i : 
carbid ©, ; and that the body SHO t © is identical in structure with 
formic anhydrid sae t e. For this reason, Friedel and | | 
Propose the n:; 
nic bodies, and consequen 
the name silici-chloroform for the first substance, tribasie silici- 
tadrivalence of silicon seems therefore as firmly established as that of — 
f£—Bull. Soc. Ch., UL, vii, 322, April, 1867. ae 
