378 
DR. A. W. HOFMANN’S RESEARCHES INTO THE 
On analysis 0‘4155 grra. of platinum-salt gave 0'1212 grm. of platinum. 
The formula 
Ci6 Hjg N, H Cl, Pt 01,=- 
C, H3 
C 4 H 5 ^N, H Cl, Pt CI 2 
V.C10 , 
requires 
Theory. 
A 
1 equiv. of Hydrochlorate of Methylethylamylamine 165‘50 49*38 
2 equivs. of Chlorine 71'00 21‘18 
1 equiv. of Platinum 98*68 29*44 
Experiment. 
29*36 
1 equiv. of Platinum-salt 335*18 100*00 
In the preceding experiments, the radicals of the alcohols C„ H^n+a) Og have been 
exclusively used as replacing materials. However, as might have been expected, 
nitrile-bases containing a radical which is not homologous but only analogous to the 
two others, exhibit exactly the same deportment when submitted to the action of 
iodide of methyl, of ethyl or of amyl. In order to establish this point, I had to return 
once more to the aniline-series. 
Action of Iodide of Ethyl upon Diethylaniline. 
In my former paper* I have recorded a few experiments on the action of bromide 
of ethyl upon diethylaniline. The results, unintelligible to me at that period, are 
now perfectly clear. I have since repeated these reactions, substituting the iodide 
for the bromide on account of its more prompt action. Diethylaniline is perfectly 
soluble in iodide of ethyl ; on exposing the mixture, sealed in tubes, to the temperature 
of boiling water, the liquid column gradually separates into two layers, the lower one 
increasing in bulk with the time of exposure, and solidifying on cooling into a semi- 
solid crystalline mass. The reaction is terminated, when, after half a day’s ebullition, 
the volume of the lower layer, which is the new iodide in the fused state, ceases to 
increase. 
The mixture is now distilled with water in order to separate an excess of either 
diethylaniline or iodide of ethyl, when a strongly acid solution of iodide of phenylo- 
triethylammonium is obtained, which usually contains a small quantity of hydriodate 
of diethylaniline, as may be inferred from the oily precipitate produced in the solu- 
tion by potassa, which does not redissolve on addition of more water. 
Digestion with protoxide of silver separates the two bases, one of which, diethyl- 
aniline, being insoluble in water, remains mixed with the oxide and iodide of silver ; 
the other, the oxide of phenylotriethylammonium, forming a powerfully alkaline solu- 
tion of a strongly bitter taste. 
* Philosophical Transactions, 1850, Part I. p. 107. 
