Confi<;'uration of Aqiiotri- and dianuiiinelCobalt Complexes. 



17 



Fia:. 4. 



[Co(NH3)2(H20)2Cl2)S04H — 

 (Co(Nl-r3)5(H20)3)Cl3 fron, (Co(NH-j)3(N02)3) 



(CoCl(H20)3(NH3)2)SO<j 



CTT O (1) ~| 

 Co jj^^ ^g^ en.i CI. is the funda- 

 mental oi:»e of the first class, the configui-ation of the other three 

 compounds must he analogous to that of this salt; in other words, 

 the two water molecules in them coordinate in the trans-position. 

 So [Co(NH3),(HA\Cl]SO, and [Co(NH3)3(H20)3] CI3 (8) have the 

 following configurations respectively': 



NH, 



HO. 



'NH, 



B.,0, 



SO^ 



■^HjO 



H.O' 



l_ 



NH, 



XH, 



CI. 



H.O 



NH, 



