The reaction of Ru 2 (O 2 CMe) 4 with N, N'-bis(3,5-dimethoxyphenyl) solution shows two redox processes, assigned as successive oxidations corresponding to the Ru 2 4+/5+ and Ru 2 5+/6 redox couples. Changes in the electronic absorption spectra associated with these oxidation processes were probed using a UV/vis spectroelectrochemical study. Ru 2 (dmof) 4 reacts with dioxygen in solution to generate a purple compound that decomposes within an hour at room temperature. Bubbling N 2 gas through the purple solution regenerates Ru 2 (dmof) 4 , as evidenced by UV/vis spectrometry and cyclic voltammetry, suggesting that the dioxygen reversibly binds to the diruthenium core.
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