226 



Since this continuation of my experiments throws considerable 

 light upon this new class of compounds, I beg leave to submit them 

 to the judgment of the Royal Society. 



In order to render more intelligible the line of argument which 

 M. Cloe'z has brought forward against the diatomic notions, it will 

 be useful to recapitulate in two words the subject of our controversy. 



M. Cloe'z admits that in the action of dibromide of ethylene upon 

 ammonia, the molecule of ethylene splits into radicals belonging to 

 three distinct groups, viz. the formic, acetic, and propionic series ; 

 these radicals acting upon one molecule of ammonia, in which each 

 of them replaces one equivalent of hydrogen, give rise to the forma- 

 tion of three primary monamines, viz. Formenamine, Acetenamine, 

 and Propenamine. 



According to the view which I defend, the molecule of ethylene 

 remains intact in the reaction, acting upon two molecules of ammonia 

 in which 2, 4, or 6 equivalents of hydrogen are replaced respectively 

 by 1, 2, or 3 diatomic molecules of ethylene ; the dibromide of 

 ethylene gives rise to the formation of three diamines belonging to 

 the same family, a primary, a secondary, and a tertiary diamine. 



Expressed in formulae the two views may thus be represented : 



Formulae o/M. Cloez. 



C 2 H ) 



Formenamine C 2 H 3 N= H \ N. 



H J 



r* TT 



Acetenamine C 4 H.N= H * N. 



H 



Propenamine C 6 H 7 N= H > N. 



/ 



Formula of Dr. Hofmann. 

 Ethylene-diamine C 4 H 8 N 2 = H/ IN, 



2 } 



(C 4 H 4 )") 



Diethylene-diamine . . C 8 H 10 N 2 = (C 4 H 4 )" I N 2 . 



H 2 J 



(C 4 H 4 )"] 

 Triethylene-diamine . . C la H 12 N 2 = (C 4 H 4 )" L N 2 . 



(c 4 H 4 y r 



