Synthesis and Structural Features of Co(II) and Co(III) Complexes Supported by Aminotrisphenolate Ligand Scaffolds

Co­(II) complexes of aminotrisphenolate ((ArO)₃N^3–) 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.