690 
ME. P. GEIESS ON A NEW SEEIES OE BODIES IN 
fectly pure by recrystallizing it once or twice from strong alcohol, afterwards dissolving 
it in ether, and allowing the solution to evaporate spontaneously. Sometimes, however, 
the crystals are slightly contaminated with traces of a body which has to be removed by 
means of caustic potassa*, in which the new compound is completely soluble, whilst the 
foreign substance remains behind as a brown resin. Hydrochloric acid precipitates it 
from the alkaline solution, and it can now be completely purified by crystallization from 
alcohol or ether. 
I. 0-2155 grm. gave 0-564 grm. of carbonic acid and 0‘096 grm. of water, corre- 
sponding to 71-31 per cent, of carbon and 4-95 of hydrogen.^ 
II. 0-33 grm. gave 47-6 cub. centims. of nitrogen at 0° C. and 760 millims. bar. 
pressure, =0-059813 grm. of nitrogen, equal to 18*12 per cent. 
III. 0*4605 grm. gave 66*5 cub. centims. of nitrogen at 0° C. and 760 millims. bar. 
pressure, =0-08356 grm. of nitrogen, equal to 18 - 14 per cent. 
These numbers led to the formula 
Calculated. 
d 18 h 14 n 4 o. 
Found. 
yv 
( 
( 
I. 
ii. 
III.' 
^18 
216 
71-52 
71-38 
— 
— 
H 14 
14 
4-63 
4-95 
— 
— 
n 4 
56 
18-55 
— 
18-12 
18-14 
0 
16 
5-30 
— 
— 
— 
302 
100-00 
Its formation is explained by the equation 
3(€ fi H 4 N 2 , NHG 3 )+H 2 0=€ 18 H 14 N 4 0+N 2 +3NH0 s . 
v v t \ v ; 
Nitrate of diazobenzol. New compound. 
It may likewise be viewed as composed of phenol and diazobenzol, viz. 
2€„ H 4 N 2 +G 6 H 6 0= G 18 H 14 N 4 ©, 
and I would therefore propose the name phenol-bidiazobenzol. 
This new compound crystallizes in brownish-red needles or plates ; it is readily soluble 
in ether, difficultly soluble in cold alcohol. Hot water dissolves it but very slightly. 
On heating, it deports itself like the compound previously described. It fuses at 113° C. 
Phenol-bidiazobenzol is an almost perfectly neutral body. Its deportment with potassa 
(in which it dissolves readily, forming a ruby-red solution) reminds one, however, of the 
properties of an acid. Ammonia-water dissolves it with difficulty, and aqueous carbonate 
of potassa not at all. Dilute acids exert likewise no solvent action ; concentrated acids, 
however, dissolve it with a blood-red colour. Decomposition ensues when the latter 
solutions are heated. 
* Instead of treating the mixture of the crude products of decomposition and carbonate of barium with 
hydrochloric acid in order to remove the latter, the new compounds may be extracted with potassa, then pre- 
cipitated with hydrochloric acid, and lastly separated, as already described, by means of alcohol. 
