RICHARDS AND MOULTON. — CUPRIANILINE SALTS. 91 



20.80 



(3.) OCTOCUPRIANILINE MoNOACETOBROlIIDE, 



This substance has been made repeatedly as follows. Two grams 

 of cupric bromide were dissolved in a hundred cubic centimeters of al- 

 cohol, and one and eight tenths grams of cupric acetate were dissolved 

 in ten cubic centimeters of acetic acid, with the addition of just enough 

 water to effect the solution. The two solutions were mixed, and 

 fifteen cubic centimeters of aniline were added. In a quarter of an 

 hour the desired crystals separated out from the deep gi-een solution. 

 The crystals resemble fine gunpowder in appearance, and possess 

 properties more nearly resembling those of compound No. 1 than 

 those of compound No. 2. 



Analyses of Cu3(C6H7N)i6Bri5(C2H302). 



I. 0.1158 gram of the substance yielded 0.0181 gram of copper. 

 II, 0.1158 gram of the substance yielded 0.0996 gram of argentic 

 bromide. 



III. 0.2000 gram of the substance yielded 0.1738 gram of argentic 



bromide. 



IV. 0.2712 gram of the substance yielded 0.2354 gram of argentic 



bromide. 



Calculated for Found. 



Cug(CeH7N),eBr,5C2H302. I. II. m. iv. 



Copper 15.62 15.71 



Bromine 36.82 36.58 37.06 36.94 



(4.) OCTOCUPRIAXILINE Tri ACETOBROMIDE, 



Cu8(C6H,N)ieBri3(C2H302)3. 



Once this compound was obtained by adding 1.86 grams of aniline 

 to a mixture of 2.23 grams of cupric bromide and 2.0 grams of acetic 

 acid in alcoholic solution. The second time it was obtained by adding 

 a few crystals of this first preparation to a mixture similar to that used 

 for preparing No. 2, just as it was on the point of crystallization. 

 The properties of this substance resemble very closely those of the 

 last ; and its analysis was conducted in the usual manner. 



