Oxygen versus Sulfur Coordination in Cobalt Superoxo Complexes: Spectroscopic Properties, O₂ Binding, and H-Atom Abstraction Reactivity.

ABSTRACT: A five-coordinate, disiloxide-ligated cobalt(II) (S = 3/2) complex (1) was prepared as an oxygen-ligated analogue to the previously reported silanedithiolate-ligated Co^II(Me₃TACN)(S₂SiMe₂) (J. Am. Chem. Soc., 2019, 141, 3641-3653). The structural and spectroscopic properties of 1 were analyzed by single-crystal X-ray diffraction, electron paramagnetic resonance (EPR), and NMR spectroscopies. The reactivity of 1 with dioxygen was examined, and it was shown to bind O₂ reversibly in a range of solvents at low temperatures. A cobalt(III)-superoxo complex, Co^III(O₂^·-)(Me₃TACN)((OSi^2Ph)₂O) (2), was generated, a

SUBMITTER: Gordon JB 

PROVIDER: S-EPMC10194424 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature