702 
MR. P. GRIESS ON A NEW SERIES OE BODIES IN 
an evolution of nitrogen gas takes place, bromophenylic acid (which separates as a 
brownish oil of the odour of creosote) being simultaneously produced. 
€ 6 H 3 Br N 2 , H Br +H 2 0=€ 6 H 5 Br O+HBr +N 2 . 
Hydrobromate of diazo- Bromophenylic 
bromobenzol. acid. 
Ebullition of nitrate of diazobromobenzol with alcohol gives rise to the formation of 
bromobenzol, which distils over with the vapour of alcohol, a yellow acid (probably 
bromodinitrophenylic) being left behind. Ammonia forms a yellow body with the simul- 
taneous production of diazo-amidobromobenzol, which, owing to its greater solubility 
in alcohol, can be readily separated from the former. The formation of diazo-amido- 
bromobenzol takes place according to the formula 
2€ 6 H 3 BrN 2 + NH 3 = € 12 H 9 Br 2 N 3 + N 2 . 
Diazobromobenzol. Diazo-amidobromobenzol. 
Sulphate of diazobromobenzol, when heated with sulphuric acid, is converted into a 
sulpho-acid, which is most probably disulphobromophenylenic acid, G 6 H 3 Br, S 2 H 4 O g . 
Nascent hydrogen, generated by the action of zinc upon sulphuric acid, in the presence 
of an alcoholic solution of bromobenzolimide converts the latter into bromaniline and 
ammonia. 
C- 6 H 4 Br N 3 + 8H=€ 6 H 6 Br N + 2H 3 N. 
Diazobromoben- Bromaniline. 
zolimide. 
When the addition of water no longer gives rise to a precipitate, indicating that the 
whole of the imide has been decomposed, the bromaniline is most easily isolated by 
evaporating the alcoholic solution on a water-bath, and distilling with caustic potassa. 
Bromaniline passes over in oily drops, which quickly solidify, and may be crystallized 
from alcohol in octahedra. These crystals, as well as the properties of the platinum- 
salt, prove it to be identical with the ordinary bromaniline. 
0-2584 grm. of the latter left on ignition 0-0661 grm. of platinum, corresponding 
to 26-5 per cent. 
€ 6 H 6 BrN, HC1, PtCl 2 requires 26-1 per cent. 
By heating the platinum-salt of diazobenzol with carbonate of sodium, chlorobenzol 
was obtained; so in like manner by the action of heat on the platinum-salt of hydro- 
chlorate of diazobromobenzol, chlorobromobenzol is produced, according to the following 
equation : — 
€ 6 H 3 Br N 2 , HC1, PtCl 2 =C 6 H 4 BrCl + Pt + Cl 2 +N 2 . 
Platinum-salt of diazobromo- Chlorobro- 
benzol. mobenzol. 
By pressing the crystals which condense in the neck of the retort between filter 
paper, and after a second distillation and crystallization from alcohol, they are obtained 
sufficiently pure for analysis. 
0-441 grm. of substance gave 0-6072 grm. of carbonic acid and 0-0832 grm. of water. 
