1036 
NH.CHs 
mi se 
\ NUCH 
NO, 
This could further be proved by. carefully oxydising the trinitro- 
compound (m.p. 154°) with chromic acid in acetic acid solution, 
which yields the monomethyl compound melting at 147°. This gives 
with alcoholic methylamine-solution the m-phenylene-derivative melting 
at 169°. 
A continued oxidation with chromic acid yields from the trinitro- 
compound m.p. 154°, a 2.3.4.-trinitroaniline (m.p. 190°), which on 
treatment with ammonia gives the above cited 2.4.-dinitrophenylene- 
diamine. 
N(CH), NHCH; NH CH; 
ANNO: co NN neem / \NO 
| 154° | —— >| 147° | > | 169° | 
\ 50s \ JNO: \ J NECH: 
NOs NO, NO, 
NILCH; NH, NH, 
ZONA, CrOz Ve NO; H.N AN 
| 147° | —— | i ——> | 250° 
\ 4 N02 \ N02 \ A Nie 
NO, NO, NO, 
Utrecht. Org. Chem. Lab. Univ. 
Chemistry. — “The injluence of the hydration and of the deviations 
from the ideal gas-laws in aqueous solutions of salts on the 
solidifying and the boiling points” By Dr. C. H. Sturrer. 
(Communicated by Prof. A. F. HOLLEMAN.) 
(Communicated in the meeting of December 30, 1914). 
When, according to van ’r Horr, we determine the irrationality 
coefficient (factor ¢) of good electrolytes in the well-known manner 
with the telephone bridge of Konrravscu, for different solutions 
from the formula 7=1-+ (n—1)e, in which » represents the number 
of ions that can be yielded by one molecule, and « the dissociation 
degree a (A = equivalent conductivity power), this appears to 
00 
fairly increase with the growing dilution until almost the theoretical 
limit has been attained, 
