Four-Electron Reduction of O₂ Using Distibines in the Presence of ortho-Quinones.

ABSTRACT: This study, which aims to identify atypical platforms for the reduction of dioxygen, describes the reaction of O₂ with two distibines, namely, 4,5-bis(diphenylstibino)-2,7-di-tert-butyl-9,9-dimethylxanthene and 4,5-bis(diphenylstibino)-2,7-di-tert-butyl-9,9-dimethyldihydroacridine, in the presence of an ortho-quinone such as phenanthraquinone. The reaction proceeds by oxidation of the two antimony atoms to the + V state in concert with reductive cleavage of the O₂ molecule. As confirmed by ¹⁸O labeling experiments, the two resulting oxo units combine with the ortho-quinone to form an α,α,β,β-tetraolate ligand that bridges the two antimony(V) centers. This process, which has been studied both experimentally and computationally, in

SUBMITTER: Zhou B 

PROVIDER: S-EPMC10863049 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature