558 
EESEAECHES OF DE. KOTMA^i^ ASB M. CASOUES 
Accordingly, allylic alcohol has the same composition as acetone and propyhc aldehyde, 
from both of which substances it nevertheless essentially differs. 
Potassium and sodium attack allylic alcohol energetically, especially if the tempera- 
ture be shghtly raised ; hydrogen is copiously evolved, and a gelatinous substance is 
formed obviously analogous to potassium-alcohol, the composition of which must accord- 
ingly be represented by the formula 
QH.KO,. 
On treating this last product with iodide of allyl, much heat is evolved, iodide of 
potassium is deposited in abundance, and at the same time there is formed a colomdess 
volatile hquid, very mobile, lighter than water, and entirely insoluble in that menstruum, 
which corresponds both in composition and reactions to ordinaiy ether. This compound, 
which we will designate by the term allylic ether, and which boils at 82° C., also results 
from the reaction of iodide of allyl on the oxides of silver and mercuiy. The following 
equations represent these reactions : — 
Q H, KO,-l-Ca H3 I=KI-hQ, O,. 
AUyl-potassium- Iodide 
alcohol. of allyl. 
AUyhc 
ether. 
2(C, H, I)+2AgO=2AgH-C., H.o O,. 
Iodide of allyl. Allylic ether. 
On treating ethylic potassium-alcohol with iodide of allyl, or allylic potassium-alcohol 
with iodide of ethyl, iodide of potassium is deposited, a colourless, aromatic, very volatile 
liquid being formed, which boils at about 64° C., and is a mixed ether containing both 
the radicals ethyl and allyl. 
The analysis of this substance has furnished the following results : — 
0-338 grm. of substance gave 0-864 grm. of carbonic acid and 0-352 grin, of water. 
The formula 
an, 
J 
requires the following values ; — 
10 equivs. of Carbon 
10 equivs. of Hydrogen . 
2 equivs. of Oxygen 
Theory. 
Experiment. 
'60 
69-76 
69-69 
10 
11-62 
11-56 
16 
18-62 
— 
86 
100-00 
Methyl-, amyl- and phenyl-potassium-alcohols, when brought in contact with iodide of 
allyl, furnish analogous results. 
By distilling allylic alcohol with the chloride, bromide or iodide of phosphorus, the 
hydi-ochloric, hydrobromic and hydriodic ethers of this series are obtained with the 
