256 



PROCEEDINGS OF THE AMERICAN ACADEMY 



5. Cupric Amnionic Acetochloride, 

 CuCl 2 . 2 NH 4 C 2 H 3 2 . 



Upon several occasions during the investigation just described, when 

 concentrated solutions of approximately equivalent amounts of cupric 

 chloride and ammonic acetate had been allowed to evaporate together, 

 especially with addition of alcohol, bright green almost cubical crystals 

 separated. These crystals were sometimes found to be mixed with 

 small amounts of ammonic chloride, and sometimes almost pure. The 

 substance is a double salt, and not a cupriammonium compound ; hence 

 it dissolves in water without apparent decomposition. The purest 

 crystals gave the following analytical results. 



Analyses of Cupric Ammonic Acetochloride. 



I. 0.3132 gr. of the substance gave 0.0G89 gr. of copper. 



II. 0.2649 gr. of the substance gave 0.0585 gr. of copper. 



III. 0.1180 gr. of the substance gave 0.1181 gr. of argentic chloride. 



IV. 0.2091 gr. of the substance gave 0.2150 gr. of argentic chloride. 

 V. 0.2121 gr. of the substance yielded enough ammonia to require 



14.47 c.c. of decinormal acid. 

 VI. 0.2158 gr. of the substance required 14.20 c.c. of acid. 

 VII. 0.1930 gr. of the substance required 13.83 c.c. of acid. 

 VIII. 0.2648 gr. of the substance gave 0.1633 gr. of carbon dioxide. 



