Non-selective stabilization of nickel(III) by saturated penta-aza macrocycles of varying size
Abstract
The nickel(II) complexes formed from the three novel penta-aza macrocycles (1), (2), and (3) are easily oxidised to the NiIII species both chemically and electro-chemically and the E½ values for the Ni2+/Ni3+ couple are only slightly dependent upon the macrocyclic ring size, in strong contrast with those found for tetra-aza systems.