DE. A. W. HOFMANN ON THE PHOSPHOEUS-BASES. 
415 
Oxide of Triethylphosphme and Iodide of Zinc. 
On mixing the solutions of the two bodies, the compound separates, either as a crystal- 
line precipitate or in oily drops, which soon solidify with crystalline structure. It is easily 
purified by recrystallization from alcohol. 
I. 0-6535 grm. of the double salt gave 0-5884 grm. of carbonic acid and 0-3070 grm. 
of water. 
II. 0-3685 grm. of the double salt gave 0-3299 grm. of carbonic acid and 0-1757 grm. 
of water. 
III. 0-5985 grm. of the salt obtained in the same preparation gave 0-4782 grm. of 
iodide of silver. 
IV. 1-1680 grm. of another preparation gave 0-9420 grm. of iodide of silver. 
V. 0-3060 grm. of the double salt gave 0-2466 grm. of iodide of silver. The crystals 
used in this analysis had been obtained by the action of zinc and phosphorus on iodide 
of ethyl. 
VI. 0-5456 grm. of substance gave 0-4333 grm. of iodide of silver. 
VII. 1-1600 grm. of substance gave 0-9340 grm. of iodide of silver. 
The salt employed in analyses VI. and VII. had been prepared by precipitating the 
hydrochloric solution of the oxide with iodide of zinc. 
These analytical results establish the formula 
PO, ZnI = (C2H5)3PO, Znl. 
Theory. 
Experiment. 
r 
I. 
II. III. 
IV. V. 
VI. 
<1 
I— 1 1 
Ce 
72 
24-53 
24-55 
24-39 
15 
5-12 
5-22 
5-29 
P 
31 
10-56 

0 
16 
5-45 
Zn 
32-5 
11-08 
■ ■■ — ’ ■■ 
I 
127 
43-26 
43-17 
43-53 43-55 
42-92 
43-51 
293-5 
100-00 
It is remarkable that this compound is formed in presence of a large excess of hydriodic 
and even of hydrochloric acid. 
The crystals melt at 99°; they readily dissolve in warm water, and even more easily 
in alcohol. From the alcoholic solution well-formed crystals are frequently obtained. 
My friend Quintixo Sella has examined these crystals. This examination,- as well 
as all the other crystallographical researches given in these papers, are parts of 
inquiries to which the celebrated crystallographer of Turin is devoting such leisure as 
is left to him by numerous professorial avocations and the onerous duties of an active 
parliamentary life. To his kindness I am indebted for the following description : — 
