Confii;uration of Aqnotri- and diainmine Cobalt Complexes. 



15 



[ 



v^o TT /-, cn-2 



CI. (fi-. I), gi-eeii [CoC],H,0(NH3)JCl (fig. .11), 



violet [Co(NK,\(K,0),Cl]SO, (tig. II) and [Co(NH.;,(H2 0),]Cl3 (tig. 

 11) wliich are prepared from the green [Co (NH3)3 Clg HgO] CI and 

 the second class inclndes the following four salts : 



_ ^^ HA2! ^'^0 ^^'^ ^^ë. ni), [Co (NH3), (H,o), cy so,H (fig. 



IV) [Co (NH,), (H^O),] CI, (fig. IV) which are ])repared from 

 [Co(NH,), (NO,),] and [Co (NH,!^ (H,0), CI] SO, (fig. IV). 



Fig. 2. 



1500 ISAO ?500 



j50C 4000 





Vs 



1 



'v..\ 



AT 





(C0CI2 H^O(NH3)3)Cl 



(CoCiai20)2(NH3)3')SO+-— 



(Co(NH3),(H20)3) CI3 fromCC0(NH3)3rt20a2)Cl 



In the first class as well as in the second, all the absorption 

 curves in their own groups are remarkably similar to each other, 

 although they differ much from those in the other class, which 



