DE. A. W. HOFMANN ON THE PHOSPHOEIJS-BASES. 
529 
an appreciable quantity of iodine, recognizable by silver-salts, but the decomposition was 
by no means complete. Hydiiodic acid separated from the mixture an iodide which 
ciy^stallized in long needles, and was found by analysis* to consist of iodide of iodo- 
phenylammonium. In the products of transformation of the phosphorus-base I w'as 
unable to trace the simple relations pointed out by theory. 
BENZYLENE-aEOIJP. 
In conclusion, I will mention a few experiments upon the mutual reaction between 
triethylphosphine and dichloride of benzylene. By this latter name I denote the 
compound, discovered by Cahouks, which is produced by the action of pentachloride of 
phosphorus on bitter almond oil. 
At ordinary temperatures, and even at 100°, the two compounds react but slowly upon 
each other; between 120° and 130°, however, especially in presence of alcohol, the 
change takes place with facility. The resulting crystalline mass, like that obtained in 
the corresponding experiments in the propylene- and amylene-series, consists chiefly 
of chloride of triethylphosphonium. After removing the phosphorus-base as completely 
as possible from the solution of the crystals, by the successive treatment with baryta, 
oxide of silver, and carbonic acid, there remained a strongly alkaline liquid, the nature 
of which I endeavoured to determine by the preparation of the iodide and platinum-salt. 
The liquid, saturated with hydriodic acid, yielded a well-crystallized iodide, which, 
however, was so soluble and deliquescent that no constant results could be obtained by 
its analysis. On the other hand, the somewhat sparingly soluble platinum-salt, which 
is precipitated in small lamiucE on treating the solution of the chloride with dichloride 
of platinum, and which may be recrystallized without alteration from boiling water, 
yielded results agreeing with one another, although the products of different prepara- 
tions were submitted to analysis. 
I. 0-5979 grm. of platinum-salt gave 0-8166 grm. of carbonic acid and 0-2863 grm. of 
water. 
II. 0-4580 grm. of platinum-salt gave 0-6290 grm. of carbonic acid and 0-2212 grm. 
of water. 
III. 0-2413 gi’m. of platinum-salt gave 0-3310 grm. of carbonic acid and 0-1160 grm. 
of water. 
IV. 0-6955 grm. of platinum-salt, decomposed by hydrosulphuric acid, &c., gave 
0-1670 grm. of platinum. 
Y. 0-7594 grm. of platinum-salt, fused with carbonate of sodium, &c., gave 0-1810 
grm. of platinum and 0-7875 grm. of chloride of silver. 
* 0-2634 grm. of iodide, precipitated by nitrate of silver, gave 0-1778 grin, of iodide of silver =36-48 
per cent, of iodine. 
The iodide of iodophenylammonium, 
C(C6HJ)H3N]I, 
contains 36-60 per cent, of iodine, precipitable by nitrate of silver. 
MDCCCLX. 4 A 
