512 



C,Hf| 

 HAN.CL 



PtJ 



This reaction may be explained by the following equation : 



PHI 



N 2 C1 2 , 2 [(C 2 H 4 Pt 2 Cl) Cl] = 2 H 4 l N 2 C1 2 + 2C 2 H 4 + C1 2 H 2 + 2Pt Cl. 



^V^ Ny^" 



Dichloride of ethylene-diammonium, and Ethylene-diplatammonium. 



ethylene-dichloride of platinum. 



In conclusion it deserves to be noticed that the compounds of 

 acetylene with subchloride of copper and other salts, which have been 

 observed by Boettcher, Berthelot and others, may probably be classed 

 with the group of the ethylene-dichloride of platinum. It is with 

 the intention of testing this view that we are now engaged in an in- 

 vestigation of the deportment of protochloride of platinum with ole- 

 fiant gas. 



The observations described in this Note were made in Professor 

 Hofmann's laboratory. 



* 



