680 
ME, P. GrEIESS ON A NEW SEEIES OE BODIES IN 
pound of hydrate of potassium with diazobenzol. The reaction which takes place may 
be expressed by the following equation : — 
G 6 h 4 N 2j KHG+G 6 H 7 N, HC1=G 12 H u N3+KC1+H 2 0. 
Hydrate of potassium HydroeMorate Diazoamido- 
with diazobenzol. of aniline. benzol. 
COMPOUNDS OE DIAZOBENZOL WITH AMIDO-ACIDS. 
Amido-acids are likewise capable of entering into combination with diazobenzol. One 
would have expected that the compounds to which this reaction gives rise would deport 
themselves in an analogous manner to the sulphate or nitrate of diazobenzol, which, 
like" the salts of organic bases, are capable of double decomposition. This, however, is 
not the case. The compounds of diazobenzol with amido-acids behave more like 
simple bodies, exhibiting much similarity to the diazo-amidobenzol, being capable, like 
the latter, of forming, with bichloride of platinum, double compounds of the nature 
of the potassio-bichloride of platinum. They possess, moreover, the property of com- 
bining with metals, giving rise to bodies which correspond entirely to the salts of simple 
acids. 
Diazobenzol-amidobenzoic acid , \ ® 4 '1 . 
l€ 7 H 7 NG 2 
This compound is obtained by simply mixing an aqueous solution of the nitrate of 
diazobenzol (1 molecule) with a solution of amidobenzoic acid (2 molecules). It sepa- 
rates as a yellow crystalline precipitate which is readily freed from the mother-liquor, 
and when dry dissolved in ether and filtered. The ethereal solution deposits on 
evaporation yellow crystals, which are obtained pure for analysis by washing with cold 
alcohol. 
0’8333 grm. of substance gave 0-785 grm. at C0 2 and 0-1458 grm. of water, corre- 
sponding to 64-23 per cent, of carbon and 4 - 86 per cent, of hydrogen. 
0-49 grm. gave 68-8 cub. centims. of nitrogen at 0° C. and 760 millims. pressure, 
=17-4 per cent. 
Theory. 
_ 
Experiment. 
( — 
^13 
156 
64-73 
64-23 
Hu 
11 
4-56 
4-86 
Ns 
42 
17-43 
17-65 
0 2 
32 
13-28 
— 
241 
100-00 
This body is formed according to the equation 
Nitrate of diazobenzol. Amidobenzoic Diazobenzol-amido- Nitrate of amidoben- 
acid. benzoic acid. zoic acid. 
Diazobenzol-amidobenzoic acid forms small indistinct plates or crystalline grains. It 
