114 
DR. A. W. HOFMANN’S RESEARCHES REGARDING THE 
Percentage of platinum. 
t ^ \ 
I. II. III. 
31-33 31-78 31-96. 
The formula 
Ci4 Hg N, H Cl, Pt CI 2 
requires the following- values : — 
Theory. 
1 equiv. of Methylaniline . . 
107-00 
34-16 
1 equiv. of Hydrochloric acid. 
36-50 
11-65 
2 equivs. of Chlorine . . . 
71-00 
22-67 
1 equiv. of Platinum .... 
98-68 
31-52 
1 equiv. of Platinum-salt . . 313-18 
not attempted to form a dimethylaniline. 
100-00 
Mean of I. and II. 
31-55 
Action of Iodide of Methyl upon Ethylaniline. 
Methylethylaniline {MetliylethylopJienylamine ) . 
I have established the existence of this compound merely by qualitative experi- 
ments. The mixture of ethylaniline and iodide of methyl begins to crystallize after 
two days’ exposure to the temperature of boiling water. Methylethylaniline resembles 
the preceding base in its odour, but has no longer any action upon hypochlorite of 
lime. I had not prepared a sufficient quantity of the compound for a determination 
of the boiling-point. The salts of this base are extremely soluble. With the excep- 
tion of the hydrobromate, I have not been able to obtain a single one in crystals. 
Even the platinum-salt is not to be obtained in the crystalline form ; it is extremely 
soluble, and separates, if very concentrated solutions be employed, as a yellow oil, 
which does not solidify even after lengthened exposure to the air. This circumstance 
has prevented me from fixing the composition of methylethylaniline by a number. 
It cannot however be doubted that it is represented by the formula — 
C18 H 43 N=Cio-( 
H2' 
r 1 
["^2 H3 
C2H3 
>n=Jc 4 u , 
.C4 H5J 
lCi2 H5J 
V'N. 
This compound presents a certain degree of intei-est, inasmuch as the 3 equivs. of 
hydrogen in the ammonia are replaced by three different radicals, namely by methyl, 
ethyl and phenyl. I have prepared however a similar compound containing, instead 
of methyl, amyl, whose properties permitted an easier analysis. 
