700 
ME. P. GrEIESS ON A NEW SEEIES OE BODIES IN 
The action of aniline upon nitrate of diazobromobenzol gives rise to diazobromo-amido- 
benzol, which not only has the same empirical composition as the diazobenzol-amido- 
bromobenzol(G 12 H 10 Br N 3 ) (page 678), but resembles it in every other respect. It would, 
no doubt, be of interest to determine whether both compounds are identical or only 
isomeric. I must, however, defer answering this question till a future opportunity. 
Diazobromobenzol-amidobenzoic acid , I^^Bi N 2 1 
Ig 7 h 7 no 2 J 
This body is obtained as a yellow crystalline precipitate on mixing an aqueous solution 
of nitrate of diazobromobenzol and amidobenzoic acid, according to the equation 
G fi H, Br N 2 NH0 3 -|-2G 7 H 7 NG 2 =( Ge H 3 Br N 4+G 7 H 7 N0 2 , NH0 3 . 
6 3 2 3U 7 7 2 J-T 7 7 2, 3 
Nitrate of diazobromo- Amidobenzoic Diazobromobenzol- Nitrate of amidoben- 
benzol. acid. amidobenzol. zoic acid. 
Recrystallized from ether it forms roundish lumps of small needles or plates. In 
every other respect it is identical with diazobenzol-amidobenzoic acid. 
IMIDOGEN COMPOUNDS OF DIAZOBEOMOBENZOL. 
Diazobromobenzolimide , 
(G 6 H 3 ^rN 2 )''J K 
On mixing the yellow crystals of perbromide of diazobromobenzol with solution of 
ammonia, they are speedily converted into a yellowish oil, which, after a single distilla- 
tion with water, is obtained in an almost colourless condition. This oil is diazobromo- 
benzolimide in a perfectly pure state. 
If the temperature of the atmosphere be not too high, the oil usually solidifies after 
a short time. If this does not take place, artificial cold must be resorted to. The new 
compound is obtained for analysis by removing the water and drying over sulphuric acid. 
0-432 grm. of substance gave 0-5803 grm. of carbonic acid and 00958 grm. of 
water. 
0-3213 grm. gave 53-8 cub. centims. of nitrogen at 0° C. and 760 millims. barom. 
pressure = 0-06704 grm. of this gas. 
Calculated. 
Found. 
r~ 
72 
36-36 
36-63 
h 4 
4 
2-02 
2-45 
Br 
80 
40-40 
— 
n 3 
42 
21-22 
21-04 
198 
100-00 
