
%0 Journal Article
%A Sutton, GJ 
%T Some Studies in Inorganic Complexes. VIII. Cobalt(II) and Cobalt(III) with 2-Picolylamine
%J Australian Journal of Chemistry
%D 1960/12/01
%V 13
%N 4
%P 473-477
%K 
%R https://doi.org/10.1071/CH9600473
%U https://www.publish.csiro.au/paper/CH9600473 
%X Complexes of cobalt(II) and (III) with the chelating ligand 2-picolylamine have been prepared and studied. Those of cobalt(II) are Copic3(ClO4)2 and CopicI2.2H2O, where pic is the ligand 2-picolylamine. Measurements of magnetic susceptibility have shown that in both of these the cobalt atom is spin-free, giving rise to momenta of 4.8 and 4.9B.M. respectively. By means of conductance measurements in water, methanol, nitromethane, and nitrobenzene, it has been shown that the former is an octahedral complex and the latter, whilst probably octahedral, could be tetrahedral. The cobalt(III) complexes described include [Copic3](ClO4)3, [Copic2Cl2]Cl.HCl, [Copic2Cl2]Cl, [Copic2(NO2)2]NO3.½H2O, [Copic2(NO2)2]NO2, and [Copic2(H2O)2](ClO4)2. By means of the above measurements it has been shown that all the latter are diamagnetic octahedral complexes. A study of absorption spectra in the visible region, in the above solvents where possible, has also been made and the results correlated to solution stability. Attempts to resolve the Copic33+ complex into its enantiomorphs were unsuccessful. 
