Coufiguration of Atjuotri- ami diaminine Cobalt Complexes. 



27. 



[Co (NH,)« C1,H,0] X, [Co (NH,), CI (H,0) J X„ [Co (NH,)^ (H,0) J X„ 

 [Co(NH3>,Cl2(H,0 ,]X, [Co(NH3)2(H,0)3Cl]X„ [Co(NH3)3(N03)3], 

 [Co (NH«), (K,0),] X,, [Co (NH3), CI H2O] X, [Co (NHä)^ C^O, . NO,] 



3. — The fullowiiig two new co1)alt complex salts were produced. 



1 ) Trans [Co (NB.^% (H.^0%] CI, 



FLO, 



NH, 



H,.0 



H„0 



NH, 



CI3 



(2) [Co (NH,\, CA .NO3] 



NH3 



n 



coo. 



,-VH, 



coo-^ 



XO, 



4. — The formula [Co (NH3)3 CA (1120)2] NO3, which was given 

 by Werner, must be amended to [Co(NH3)3C204.N03].B[20. 



O. — With regard to the substitution reactions of the cobaltam- 

 mines which have radicals of the strong acids in the 

 complex nucleus, a clear explanation has been given 

 by the study of absorption of light and electrolytic 

 conductivity. 



In conclusion, the author tenders his sincere thanks to Prof. 

 Y. Shil)ata for his kind guidance and suggestions. 



(The Laboratory of Inorganic Chemistry, the College 

 of Science, Imperial University of Tokyo). 



Published March 3 Ist, 1921. 



