

ITS PRODUCTS OF DECOMPOSITION. 75 
} Experiment. Calculation. 
a 
Carbon, : 3 : , 39°69 40:27 C3, 216 
Hydrogen, . * E 2 3°66 3°35 Hs 18 
Bromine, f : 2 “ 44:68 44-72 B, 240 
Nitrogen, 4 : : ; bes 2-61 N 14 
Oxygen, 5 P : : oo 9-00 O, 48 
100-00 536 
These results agree sufficiently well with the formula C,, H,, Br, O, pro- 
duced by the substitution of three equivalents of bromine; and this formula has 
been confirmed by the analysis of its platinum salt, which will be given below. 
In such cases as have been hitherto examined, the substitution of three equi- 
valents of bromine in a base, has entirely destroyed its basic properties, but tri- 
bromocodeine is still a base, though an extremely feeble one. Its salts are all 
sparingly soluble in water and amorphous; and as there is no possibility of ascer- 
taining their purity, I have not pursued their investigation to any extent. 
Hydrochlorate of Tribromocodeine.—It is obtained by dissolving the base in 
hot dilute hydrochloric acid, and is deposited on cooling as an amorphous 
powder. 
Hydrobromate of Tribromocodeine.—This is the substance deposited during the 
preparation of tribromocodeine. It is a bright-yellow powder, perfectly amorphous, 
and very sparingly soluble in cold water. On boiling, however, alarger quantity 
is taken up, and deposited unchanged on cooling. 
Its analysis gave the following results :— 
7-501 grains hydrobromate, dried at 212°, gave 
I 8-868 ... of carbonic acid, and 
{009 ++ of water. 
6-840 grains hydrobromate, from another preparation, gave 
II 8-072 ... of carbonic acid, and 
{ 1:767  ... of water. 
3'762 grains hydrobromate gave 4°865 grains bromide of silver. 

Experiment. Calculation. 
9s aii i gi eal ee i 
Carbon, . i 32-24 32°18 32°84 Cr 432 
Hydrogen, . © 2°83 2°86 2:96 B55 39 
Bromine, . ; ae 55:03 54°75 Br, 720 
Nitrogen, . 5 BaP fee 2-12 Ny 28 
Oxygen, . 5 oo os 7:33 O15 96 
100-00 1315 
These results approach most nearly to the formula :— 
2(Cy, H,, Br; N O,) + 8 H Br. 
They present, however, a certain deficiency, both in the carbon and hydrogen, 
and an excess in the bromine; but no other formula can be found at all approxi- 
