200 



The following salts have been prepared and analysed : 



Formulae. 



Dinitroethylate of silver N 2 C 4 H 5 O 4 Ag 



Double nitrate and dinitroethylate of silver .N 2 C 4 H 5 O 4 Ag + NO 6 Ag 



Dinitroethylate of copper 2(N, C 4 H 5 O 4 Cu) + HO 



Dinitroethylate of zinc (crystallized) 2(N 2 C 4 H 5 O 4 Zn) + HO 



Dinitroethylate of zinc (anhydrous) N 2 C 4 H 5 O 4 Zn 



Diuitroethylate of zinc (basic) N 2 C 4 H 5 O 4 Zn-j- ZnO 



Dinitroethylate of zinc and zincethyl .... N 2 C 4 H 5 O 4 Zn + C 4 H 5 Zn 



Dinitroethylate of baryta N 2 C 4 H g O 4 Ba 



Dinitroethylate of lime . . N 2 C 4 H 5 O 4 Ca+ 3HO 



Dinitroethylate of magnesia N 2 C 4 H 5 O 4 Mg 



Dinitroethylate of soda N 2 C 4 H 5 O 4 Na. 



Dinitromethylic acid. When binoxide of nitrogen is absorbed by 

 zincmethyl, dinitromethylic acid is produced, and forms a series of 

 salts homologous with those of dinitroethylic acid. The formula of 

 this acid is 



N 2 C 2 H 3 O 4 H, 



and the following salts have been examined : 



Dinitromethylate of zinc N 2 C 2 H 3 O 4 Zn + HO 



Dinitromethylate of soda N 2 C 2 H 3 O 4 Na + 2HO 



Dinitromethylate of zinc and zincmethyl. . N 2 C 2 H 3 O 4 Zn+C 2 H 3 Zn? 



It is difficult to arrive at any satisfactory conclusion relative to the 

 rational constitution of this series of acids ; they may be regarded as 

 belonging to the type of nitrous acid, containing a double equivalent 

 of nitrogen, and in which one atom of oxygen has been replaced by 

 an alcohol radical, thus, 



CnHn+1 



O 



or they may be viewed as constructed upon the hyponitrous acid 

 type, one equivalent of oxygen being replaced by an alcohol radical, 

 and a second by binoxide of nitrogen, thus, 

 CnHn+1 



