284 



illustrated by the parallelism of their products of decomposition. 

 Thus guanidine, when treated with nitric acid, is transformed into 

 ammonia and urea, 



CH 5 N 3 H a O=H 3 N + CH 4 N 2 0. 



In a similar manner the triethylated compound, when submitted to 

 distillation, splits into ethylamine and diethylurea, 



CH 2 (C 2 H 5 ) 3 N 3 , H 2 = (C 2 H 5 ) H 2 N + CH 2 (C 2 H 6 ) 2 N 2 O. 



The transformation of cyanuric ether into the new base presents 

 additional interest, inasmuch as it exhibits the passage of this sub- 

 stance into ethylamine under a new aspect. MM. Habich and Lim- 

 pricht have already pointed out that this transformation is by no 

 means accomplished in one bound, an indifferent intermediate com- 

 pound being formed, which from its products of decomposition was 

 found to contain 



C 8 H 17 N 3 2 = C a H 2 (C 2 H 5 ) 3 N 3 O a . 



The same oily compound accompanies the new base which is formed 

 by the action of ethylate of sodium upon the cyanurate of ethyl. 

 This substance stands midway between the ethylated base and cya- 

 nurate of ethyl, and it is thus seen that the latter passes through 

 two intermediate stages before it is converted into ethylamine, the 

 transformation consisting in the successive assimilation of three 

 molecules of water, which determines the gradual elimination of the 

 'carbon of the cyanuric acid in the form of carbonic acid : 



C 3 (C 2 H 5 ) 3 N 3 3 + H 2 0=C0 2 +C 2 H 2 (C 2 H 5 ) 3 N 3 2 



Cyanuric ether. Indifferent Body. 



C 2 H 2 (C H 5 ) 3 N 3 Q 2 +H 2 0=C0 2 +CH 4 (C 2 H 5 ) 3 N 3 Q 



Indifferent Body. New Base. 



CH 4 (C 2 H 5 ) 3 N 3 O + H 2 = C0 2 + 3[H a (C, H 5 ) N] 



New Base. Ethylaraine. 



In the transformation of cyanuric acid into ammonia, obviously 

 the same succession of changes must be distinguished. In fact the 

 intermediate products are well known, although they have not as yet 

 been obtained directly from cyanuric acid. The first product is the 

 compound discovered by Wiedemann among the products of the 



