ee Sat Faye a Cy eee 
J. M. — on Ethers of Arsenic Acid. 15 
air, in order to free it as far as possible from products of decom- 
position. The analysis of this product gave C=44°82 per cent 
and H=8-41 per cent instead of C=51-14 per cent and H=9°37 
per cent. 
The products analyzed appear to have been arseniate of 
amyl mixed with arsenic aci 
ARSENITE OF ETHYL. 
The ethers of arsenious acid can be prepared more readily 
than these of arsenic acid, and several reactions may 
— to obtain them. 
rsenite of ethyl is produced in the following reactions : 
By the action of arsenious acid on the silicate of ethyl By 
the action of iodid of ethyl on the arsenite of silver. By the 
action of the chlorid or bromid of arsenic on the alcoholate of 
sodium. ei of arsenic and the alcoholate of sodium 
give no arsenite of ethyl. 
hen arsenious acid 4 is heated with alcohol to about 200° in 
a sealed tube, a considerable quantity of the acid dissolves, and 
cry es out on cooling as beautifully formed octahedrons, 
A small quantity of arsenic is reduced and a corresponding 
quantity of aldehyd is formed. No arsenious ether is formed. 
rsenious acid was heated with a mixture of common ether 
and a of ethyl for 20 hours at 200°, but no reaction took 
Fas It ial highly probable that arsenite of ethyl might be 
obtained by heating together, common ether pa chlorid of 
arsenic according to the reaction 
AsCl,+3(C,H;),0= (C,H,),As0,+8C,H,Cl, 
but this proved not to be the case, for after ee two substances 
had been heated together 20 hours at 200°, it was found that 
no chlorid of ethyl and no arsenite of ethyl nad be been formed. 
It been pba noticed that by a process of reduction 
arienite of ethyl is produced, when arsenic acid is heated with 
silicic ether. When arsenious acid is heated to about 200° in 
a sealed tube with silicic ether, the only reaction which takes 
