Con fif.li ration of aquotri- and diammiue Cobalt Complexes. 



11 



("■^) 



NH, 



■NH3 



CI' 



SO4H + H,0 > 



~\ ^n,o 



H,ü J 



(I) 



NH, 



H,.0. 



fNH, 



H„0 



(3) 



NH, 



HO . 



■NH, 



CI' 



H,0 



(^) 



CI 



in) 



NH, 

 C\ , 7 Î^'H= 



SO4H + H2O 



H,0 

 (B) 



NH, 



SO, 



H,0 



•NHj 



CI 



H.,0 



U.O 



H.O 

 (III) 



SO, H + H2O 



■^- 



H,,0 

 (B) 



NH, 



SO, 



'NH. 



H.,0' 



H.,0 



HO 

 (A) 



Sf)^ 



By the study of the absorption spectra, it is confirmed that the 

 above triaquocldorodiammine cobaltic salt, [Co(KHs\CUH20)3] SO« 

 has the configuration shown under (A). (For full explanations -see 

 under the section on absorption). It is naturally to be expected 

 that some relations exist between the configuration and the colour 

 of these chemical compounds ; examples in which the salts have 

 analogous configurations and the same colour are shown below : 



r 



(Indigo lilm-) 



SO; 



(Indio-o blue) 



H,Ü 



(Indigo Ijlue) 



As we easily obtain from [Co Cl2:H20)2(NH3)2] SO,H, 

 [CoCl(H20)3(NH3)2] SO« as above mentioned, which has the 

 structure shown by (A), the configuration of tlie former is not as 



