A stable radical within a N–Co–N core.

Autor: Bhandari, Anirban, Park, Gyeong Min, Lee, Heui Beom, Hong, Sugyeong, Kim, Sun Hee, Byon, Hye Ryung, Lee, Yunho
Předmět:
Zdroj: Chemical Communications; 9/18/2024, Vol. 60 Issue 73, p9970-9973, 4p
Abstrakt: A N–Co–N core is embedded within [Co(CNC)2]2+ (1) supported by two bis(4-methyl-2-(3-methyl-imidazolium)phenyl)amine (CNC) ligands. This species reveals a stable S = 1/2 state and its spin density is significantly delocalized within the N–Co–N core via parallel π-bonding interaction. Interestingly, it displays unusual stability towards O2 and water, proving that the core is well protected. Upon reduction, compound 1 was converted to its reduced diamagnetic species [Co(CNC)2]+ (2) having two amide donors and a low-spin Co(III) ion, which can be oxidized by air to regenerate 1. [ABSTRACT FROM AUTHOR]
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