212 DR T. ANDERSON ON SOME OF THE 
line flocks of bromopianyl are immediately deposited, which are purified by solu- 
tion in boiling spirit. Bromopianyl is thus obtained in colourless transparent 
needles, very sparingly soluble in water, much more so in alcohol and ether. It 
is rather more fusible than chloropianyl, its melting point being 332°; but in its 
general characters and relations to acids and bases it is so similar to that sub- 
stance that the same words may serve to describe both. Its analysis gave— 
8-202 ... carbonic acid, and 
5:105 grains of bromopianyl, dried at 212°, gave 
1565). 5) og. | water, 
4-200 grains of bromopianyl gave 
2883  ... bromide of silver. 
Experiment. Calculation. 
pe 
Carbon, . : : : . 43°81 43-95 Gat 120 
Hydrogen, =. : - . 3840 3°29 lah 9 
Bromine, C 5 ‘ 29°21 29°30 Br 80 
Oxygen, . 5 4 . 2358 23°46 0, 64 
100-00 100-00 273 
corresponding with the formula C,, H, Br O,. 
Action of Chloride of Iodine on Opianyl. 
Iodine, whether in solution in alcohol or in the solid form, is entirely without 
action on opianyl. I therefore tried whether the ingenious process described by 
Mr Browy for causing the substitution of iodine for hydrogen would succeed in this 
case, and the experiment proved completely successful, although the change was 
very slowly effected. When chloride of iodine was added to an aqueous solution 
of opianyl, no crystals were deposited at first, and the fluid retained its colour. 
It was placed upon the sand-bath, in a moderately warm place, where it was left 
for several days, at the end of which time crystals of an inch in length, and mixed 
with some iodine had deposited. The crystals were separated, and dissolved in 
boiling alcohol, which deposited them pure and colourless. 
Iodopiany] is obtained in colourless needles of considerable size and great beauty, 
which are scarcely soluble in water, but dissolve in alcohol and ether. At 234° 
it fuses to a colourless liquid, which soon becomes brown, and at a higher tem- 
perature it is decomposed and iodine evolved. Nitric acid destroys it, with sepa- 
ration of iodine. Sulphuric acid dissolves it, and on heating a dark colour is 
produced. Its analysis gave 
9530 ... carbonic acid, and 
6-993 grains of iodopianyl gave 
1-865 eee water, 
4-735 grains of iodopianyl gave 
3-460 ... iodide of silver. 
