DE. A. W. HOFMANN ON THE PHOSPHOEUS-BASES. 
435 
hydrogen in urea, which had remained doubtful hitherto, and illustrates in a remarkable 
manner the persistence of the type urea under the influence of an almost overwhelming 
substitution. At the same time it deserves to be noticed that the corresponding oxy- 
genated urea remains to be discovered. 
The new compound, as already mentioned, possesses the properties of a well-deflned 
organic base. Insoluble in water, it dissolves with the greatest facility even in very 
diluted acids, giving rise in many cases to easily-crystallizable salts which are capable of 
double decomposition, and from which the base may be reprecipitated by the careful 
addition of potassa or ammonia. 
Chloride . — The solution of the phenyl-compound in warm concentrated hydrochloric 
acid solidifles on cooling to a crystalline mass, which, when recrystallized from mode- 
rately warm water, furnishes splendid cadmium-yellow crystals, frequently an inch in 
length. Boiling water has to be avoided, since it decomposes the substance. Even the 
dry crystals are altered at 100°; they must therefore, like all the other salts of the base, 
be dried in vacuo over sulphuric acid. 
I. 0T953 grm. of substance gave 0‘3850 grm. of carbonic acid and 0T293 grm. of 
water. 
II. 0-5G35 grm. of substance gave 0'2850 grm. of chloride of silver. 
These numbers correspond to the formula 
r 
Ci3 H2 iNPSC1 = 
Theory. 
■ (C S)" 
H(aH5)2 
NP 
Cl. 
Experiment. 
A 
mentioned. 
The formula 
^13 
156 
53-88 
II 21 
21 
7-25 
N 
14 
4-84 
P 
31 
10-71 
S 
32 
11-06 
Cl 
35-5 
12-26 
289-5 
100-00 
Both 
in preparation and ] 
. of bromide gave 
0-1620 
I. 
53-76 
7-36 
II. 
12-51 
(C S)" 
Ci 3 H 21 N P S Br = H (C 2 
NP 
L (C2H,)(CeH3)J 
3 M 2 
Br 
