706 
ME. P. GKRIESS ON A NEW SEEIES OE BODIES IN 
NiazocUorobenzol , G 6 H 3 C1N 2 , is obtained as a highly explosive lemon-yellow 
precipitate. 
DIAZODICHLOBOBENZOL COMPOUNDS. 
'Nitrate of diazodichlorobenzol presents itself in the form of white plates. The per- 
bromide, G 6 H 2 Cl 2 N 2 , HBr 3 , which is formed by the action of bromine-water, crystallizes 
in yellow prisms ; the platinum-salt in small, beautiful, yellow, very brilliant plates. 
0-3975 grm. of the latter compound gave 0-1015 grm. of platinum. 
(G 6 H 2 C1 2 N 2 , HC1, PtCl 2 ). 
Calculated. Found. 
Platinum .... 26-01 per cent. 25-54. 
DIAZOIODOBENZOL COMPOUNDS. 
It will suffice if I give likewise only a short outline of these bodies, owing to the 
great resemblance which usually exists between them and the compounds of diazobro- 
mobenzol, both in regard to their preparation and chemical deportment, and also with 
respect to their physical properties. 
Nitrate of Niazoiodobenzol, G 6 H 3 XN 2 , NHG 3 , 
is prepared from nitrate of iodaniline, precisely like the corresponding bromo-com- 
pound, and crystallizes in white needles or prisms, which are exceedingly soluble in 
water. 
Sulphate of Niazoiodobenzol , G 6 H 3 IJST 2 , SII 2 0 4 , 
crystallizes in small plates, which are easily soluble in water, difficultly so in alcohol. 
0-5665 grm. of substance gave 0-4025 grm. of sulphate of barium. 
g 6 h 3 in 2 
230 
Calculated. 
70-12 
Found. 
sh 2 o 4 
98 
29-88 
29-92 
328 
100-00 
Perbromide of Niazoiodobenzol , G 6 H 3 IN 2 , HBr 3 , 
forms small lemon-yellow slender plates. 
0-4395 grm. of substance, decomposed with solution of ammonia, gave 0-525 grm. of 
bromide of silver. 
G 6 H 3 IN 2 , HBr 3 . 
Calculated. Found. 
Bromine . . . . 50-95 per cent. 50-83 
On boiling this compound with alcohol it yields bromoiodobenzol, G 6 H 4 Br I, which 
crystallizes from ether or alcohol in large white plates, which are volatile without 
decomposition. 
