ive Compound formed by the 
BY HAMILTON P. CADY. 
During the progress of some work on liquid anhydrous ammonia 
it became necessary to investigate its action on iodin. 
Several investigations on the action of dry ammonia gas upon 
iodin have been carried out from time to time with rather varying 
results. Bineau* measured the volume of dry ammonia gas ab 
sorbed by a weighed quantity of iodin and deduced the formula 
3 NH,, 21. The product was a brilliant dark blue liquid. Milton} 
however found a very much smaller absorption, which was not 
materially increased by cooling to —18°.' Raschig] made a third 
investigation in order to clear up these discrepancies, and found 
that the composition varied with the temperature. At 330 4 ne 
found the composition NH,I, at 20° (NH, gts; at © or GNHEL Digi ks 
AUTO PIN di iydligs kk es results were based not on analysis but 
upon the gain in weight when dry ammonia gas was passed over a 
weighed quantity of iodin. These are all non-explosive liquids, 
the last one gives up part of its ammonia when taken from the 
freezing mixture. 
Seamon§ obtained a non-explosive liquid, solidifying at oe nay 
ing the composition NH,I, by the action of ammonia gas upon 
the fact. that: iodim 1s soluble in 
iodin. G. Gorel| mentions 
given in Watts Dictionary, 
liquid ammonia but in the brief abstract 
SMECLS CUD) WiLiy olka aye pene nothing is said about the products 
found. 
It seemed probable that the action of liquid ammonia upon 
iodin would be practically the same as that of gaseous ammonia, 
and that the results would be an addition product. In order to 
test this conclusion the following experiments were then made: 
*Ann. Chim. phys. [8] 15, 80 
tAnn. Ohim. phys. | 
tA. 241, 258 
80. N, 44, 188. 
Prov. Roy. Soc. XX, 441. 
(71) KAN. UNIV. QUAR,, VOL, VI, NO. 2, APRIL, L897, SURIES A 
