682 
ME. P. GEIESS ON A NEW SERIES OE BODIES IN 
Diazobenzolimide , € 6 H 5 N 3 =^ 6 H4 ^ |n. 
On treating perbromide of diazobenzol with aqueous ammonia, a speedy decompo- 
sition ensues with evolution of much heat. The products of the reaction are, first, 
bromide of ammonium, this passes into solution; secondly, diazobenzolimide, which 
separates as a heavy oil, rather highly coloured by a brown substance simultaneously 
produced in small quantity. By repeatedly distilling the oil with water it is obtained 
perfectly pure, and of a slightly yellowish colour ; the substance which imparts to it the 
intense brownish colour, not being volatile, is left behind in the retort. The purified 
oil is separated from the water by means of a separating funnel, placed over chloride of 
calcium, and then distilled once more from a water-bath in vacuo. 
0T148 grm. gave 0-253 grm. carbonic acid and 0-0505 grm. of water. 
Calculated. 
A 
Eonnd. 
( 
72 
60*50 
60-10 
H 5 
5 
4-20 
4-88 
n 3 
42 
35-30 
— 
119 
100-00 
Its formation is explained by the following equation : — 
€ 6 II 4 N 2 , HBr, Br 2 + 4NH 3 ==^ 6 H<1 ^"|n + 3NH 4 Br *. 
V y. t V y l 
Perbromide. Diazobenzolimide. 
Diazobenzolimide is remarkable for its narcotic, aromatic-ammoniacal odour. It is 
volatilized by distillation with water, and also when heated in vacuo , as shown above. 
Distilled at the ordinary atmospheric pressure, it is decomposed with explosive violence. 
Alcohol and ether dissolve it rather difficultly. I could not -succeed in solidifying the 
oil by using a frigorific mixture of nitre and sal-ammoniac. Hydrochloric acid, even 
when concentrated, and aqueous potassa have no effect upon it. Strong nitric and 
sulphuric acids dissolve it with decomposition. 
Etliyldiazobenzolimide — ^ 
C 2 1I 5 ) 
This body is obtained in a manner exactly similar to the one employed for the prepa- 
ration of diazobenzolimide, viz. by acting with ethylamine upon the perbromide of 
diazobenzol. It is likewise a yellowish-coloured oil, having a deceptive resemblance to 
the previously described compound. 
* This decomposition of the perbromide explains the method of analysis adopted for the estimation of the 
bromine described in page 673. 
