556 
EESEAECHES OF DE. HOFMAZSFS’ AXD M. CAHOEES 
ago*, distinctly sets forth the probability of the transformation of the chloride and 
bromide of propylene into the oils of garlic and mustard by the action respectively of 
the sulphide and sulphocyanide of potassium. 
The experimental proof of the correctness of this idea was however reseiwed for 
MM. Beethelot and De Luca, and for M. Zixix. In fact these chemists demonstrated 
that the action of iodide of propylene upon the sulphocyanide of potassium or silver, 
gives rise to an oil which is absolutely identical with that furnished by distilling the 
seeds of the common mustard [Smwpis nigra) with water. 
The admission of a radical allyl (Cg Hg) analogous to ethyl (Q Hg), estabhshes a 
perfect analogy between the compounds derived from propylene and glycerin, and the 
several terms of the ethyl-series. 
Ethyl-series. 
Allyl-series. 
QHgCl . . 
Chloride . 
. . CgHgCl. 
QHgBr . . 
Bromide . 
. . CgHgBr. 
QHgl. . . 
Iodide .... 
. . CgHgl. 
C,HgS. . . 
Sulphide . 
. . CgHgS. 
C,Hg,C,NS, . 
Sulphocyanide 
.' . CgHgQXS,. 
Q Hg 0, . . 
Alcohol 
. . 
. Aldehyde . 
. . CgH.O^. 
. . 
Acid .... 
. . CgH,0,. 
There yet remained the key-stone to be inserted into this edifice, in other words, 
the alcohol had still to be discovered, to which not only all the preceding compounds 
could be referred, but which might serve in producing a long series of substances ana- 
logous to the host of compound ethers derived from common alcohol. 
After many attempts, which remained long unsuccessful on account of the facility 
mth which this class of bodies is altered, we at last succeeded in obtaining, not only the 
alcohol and ether of this series (for which we have adopted the name of the “ Allyl- 
seriesf ”), but also a very considerable number of compound ethers, and some of their 
derivatives. 
In order to arrive at this result, we have submitted many silver-salts to the action 
of iodide of allyl, expecting to obtain by double decomposition iodide of silver and a 
compound ether, from which it would be possible afterwards to extract the alcohol. 
The silver-salts are in general powerfully attacked by iodide of allyl, but comparatively 
* Quarterly Journal of the Chemical Society, vol. iii. p. Ill, 1851. 
t In a preliminary note communicated some time ago to the Eoyal Society (Proceedings, vol. viii. 
No. 19), regarding the principal facts detailed in the present memoir, we adopted the term “Acryl-series 
but as the name acryl belongs more properly to the derived radical which may he assumed to exist in acro- 
lein, we now prefer the appellation “ Allyl-series,” in accordance with the nomenclature originally adopted 
by MM. "Will and Weetheim. This name has also been adopted in several papers which appeared after 
the above-mentioned notice had been published. 
