Reversible Dioxygen Binding to Co(II) Complexes with Noninnocent Ligands.

ABSTRACT: A series of mononuclear Co(II) complexes with noninnocent (redox-active) ligands are prepared that exhibit metal-ligand cooperativity during the reversible binding of O₂. The complexes have the general formula, [Co^II(L^S,N)(Tp^R2)] (R = Me, Ph), where L^S,N is a bidentate o-aminothiophenolate and Tp^R2 is a hydrotris(pyrazol-1-yl)borate scorpionate with R-substituents at the 3- and 5-positions. Exposure to O₂ at room temperature results in one-electron oxidation and deprotonation of L^S,N. The oxidized derivatives possess substantial "singlet diradical" character arising from antiferromagnetic coupling between an iminothiosemiquinonate (ITSQ^•-) liga

SUBMITTER: Kumar P 

PROVIDER: S-EPMC11218047 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature