A N-Co-N core is embedded within [Co(CNC)] (1) supported by two bis(4-methyl-2-(3-methyl-imidazolium)phenyl)amine (CNC) ligands. This species reveals a stable = 1/2 state and its spin density is significantly delocalized within the N-Co-N core parallel π-bonding interaction. Interestingly, it displays unusual stability towards O and water, proving that the core is well protected. Upon reduction, compound 1 was converted to its reduced diamagnetic species [Co(CNC)] (2) having two amide donors and a low-spin Co(III) ion, which can be oxidized by air to regenerate 1.
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