Co(II) complexes of aminotrisphenolate
((ArO)3N3−) ligands can be prepared straightforwardly in high
yield. X-ray analysis reveals these complexes to comprise of two
different hemispheres, one containing an anionic Co((ArO)3N)−
and the other a cationic (ArO)3NH+ unit, which are associated
through hydrogen bonding. These Co(II) complexes can be
easily converted into their Co(III) analogues in air in the
presence of suitable bases such as dimethylaminopyridine and
2,2′-bipyridine, and the structural features and magnetic properties
of these latter compounds are also reported.