DE. A. W. HOriVIANN ON THE PHOSPHOEUS-BASES. 
469 
shall glance again in a subsequent chapter of this paper, and the mother-liquor furnished 
an octohedral platinum-salt, which was crystallized from boiling water and submitted to 
analysis. 
II. 0'4180 grm. of platinum-salt, treated with hydrosulphuric acid, &c., gave 0‘1180 
grm. of platinum. 
These numbers characterize the vinyl-compound. 
Experiment. 
Vinyl- Oxethyl- f ^ 
compound, compound. I. II. 
Platinum 28-19 26-81 28-53 28-23 
Chlorine 30-41 28-92 30-33 
I must, however, add at once, that I failed to reproduce this result in repeating 
the experiment in a somewhat different manner. Oxide of oxethyl-triethylphosphonium 
was evaporated in a retort until a considerable quantity of the difficultly soluble amor- 
phous platinum-salt was obtained on addition of dichloride of platinum. The mother- 
hquor of this salt furnished on evaporation well-formed octohedra. 
0-3592 grm. of this platinum-salt gave 0-3447 grm. of carbonic acid and 0-1752 grm. 
of water. 
This result shows that the oxethylated compound had not been changed. 
Vinyl-compound. Oxethyl-compound. Experiment. 
Carbon .... 27-41 26-07 26-17 
Hydrogen . . . 5-14 5-43 5-42 
The temperature in this experiment had never risen above 150° C., which may account 
for the stability of the oxethylated body under the circumstances. 
The vinyl-compound appears to .be formed also by the action of heat upon the brom- 
ethylated bromide : 
[(C, Br) (C, H,)., P] Br = [(C, H 3 ) (C^ P] Br + H Br 
Torrents of hydrobromic acid are evolved, and the residue yields, after treatment with 
chloride of silver, on addition of dichloride, an octohedral platinum-salt. The decompo- 
sition is, however, completed only with difficulty. The evolution of hydrobromic acid 
continues for hours, even when the salt is kept at a temperature (between 235° and 250°), 
at which considerable quantities are entirely decomposed. I have thus been prevented 
from procuring an amount of the salt sufficient for its identification with the vinyl-com- 
pound obtained by the action of acetate of silver. 
Vinyl-triethylphosphonium-salts are formed in one or two other reactions, which will 
be noticed in subsequent paragraphs of this inquiry. 
