250 PROCEEDINGS OF THE AMERICAN ACADEMY 



100.00 100.35 



2. Amnion - Cupriammon ium Acetochloride, 

 Cu(NH 3 ) 3 ClC 2 H 3 2 . H 2 0. 



Almost any mixture which brings together in concentrated solution 

 copper, chlorine, much acetic acid, and an excess of ammonia yields 

 ammon-cupriammonium acetochloride upon the addition of alcohol. 

 The substance consists of brilliant blue scales, having a pearly lustre. 

 These crystals lose ammonia and water slowly upon exposure to the 

 air, with marked alteration of color; they are decomposed by water, 

 a small amount of the copper going into solution. For analysis the 

 crystals were pressed between filter paper as rapidly as possible. A 

 bromine compound similar in every respect to this one has been pre- 

 pared, and will form the subject of a future communication. 



Analyses of Ammon-Cupriammonium Acetochloride. 

 I. 0.2524 gr. of the substance yielded on electrolysis 0.0698 gr. 

 of copper. 

 II. 0.2273 gr. of the substance yielded 0.0634 gr. of copper. 



III. 0.2875 gr. of the substance yielded 0.0808 gr. of copper. 



IV. 0.1337 gr. of the substance required on distillation 17.37 c.c. 



of decinormal acid to neutralize the ammonia vo'atilized. 

 V. 0.1554 gr. of the substance required in the same way 20.17 

 c.c. of acid. 

 VI. 0.0979 gr. of the substance required 12.56 c.c. of decinormal acid. 

 VII. 0.2708 gr. of substance yielded 0.1701 gr. of argentic chloride. 

 VIII. 0.2696 gr. of substance yielded 0.1700 gr. of argentic chloride. 

 IX. 0.1926 gr. of the substance yielded upon distillation with phos- 

 phoric acid a distillate requiring 8.94 c.c. of decinormal baric 

 hydroxide for neutralization with phenol phthalein. This 

 liquid yielded 0.0116 gr. of argentic chloride, containing 

 traces of argentic phosphate, which amount is equivalent 

 to about 0.81 c.c. of decinormal acid. Hence the acetic acid 

 in the distillate must have required 8.13 c.c. of the alkaline 

 solution. 



