234 Royal Society. 
Ethylene-diphenyl-diamine being a secondary diamine, it was not 
without interest to replace the two remaining hydrogen-equivalents 
by two monatomic molecules. On digesting the base with iodide of 
ethyle some hours at a temperature of 100°, a beautiful iodide was 
obtained, crystallizing in well-defined prisms, difficultly soluble in 
water, but more soluble in alcohol. 
This substance contains 
(C, i)" mw 
Y C H 9 
toes H,, Ms 1,= tof a N, I. 
H 
Treatment with potassa separates from this iodide the base as a 
crystalline body fusing at 70°, and resembling in many respects the 
previous base. It contains 
24 2 2 
(C,, H;), 
and forms a beautiful platinum-salt crystallizing in needles of the 
formula 
(C, H,)" 
C,, H,, N,= (C, H, ds N., 
[C,, H,, N,]" Cl,, 2PtCl,. 
The deportment of phenylamine under the influence of dibromide 
of ethylene gives a fair illustration of the nature of the substances 
which are generated, under the influence of diatomic molecules, from 
primary aromatic monamines. 
To complete the study of this subject, I have examined, moreover, 
the action of dibromide of ethylene upon ethylamine, as a repre- 
sentative of the monamines containing an ordinary alcohol-radical. 
Dibromide of ethylene acts upon ethylamine even in the cold, the 
products of the reaction varying according to the relative proportions 
of the two bodies, and according to the temperature. Among other 
products invariably occur the two bromides corresponding to the 
two salts of the phenyl-compounds mentioned in the previous para- 
graphs. 
These substances are the 
Dibromide of (C, H,)” 4 
ethylene-diethyl- ke, H,, N, Br,= | (C,H), > N, | Br,, and 
diammonium, H 7 
Dibromide of (C0 )o: 
diethylene-diethyl- } @,, UN, Bra | CU sEL, Br,. 
Hi, 
diammonium, 
I have fixed the composition of the former compound by the ana- 
lysis of the dibromide of the dichloride and of the base itself, all of 
which are remarkably well-defined crystalline bodies, and that of 
the latter by the examination of a well-defined platinum-salt. 
