Question

why substitutional modification of the “NacNac” ligand in [MeNC(Me)C(H)C(Me)NMe]– has made it potentially redox‐active, i.e. susceptible to one‐electron oxidation in a nickel complex, as indirectly deduced from physical properties such as magnetism?

Answer 1

When the NacNac ligand bound to metal (let's say Ni), then the nickel should undergo one-electron oxidation, as shown below.