Binuclear Complexes of Cobalt(III)

Cu(II)‐catalyzed oxidation of thiols by superoxide ligated to CoIII2

“…The observed Raman shift of 1074 cm −1 for the O─O stretching also confirms the presence of the superoxo bridge . Purity of 1 was also checked by comparing its absorbance at 700 nm (ε in M −1 cm −1 , Found 300; reported 306) …”

“…The time‐resolved spectra of the reaction indicates that the superoxo ligand of the complex 1 undergoes reduction to its peroxo moiety, 2 , and immediately takes up a proton from the solution to be converted into protonated peroxo species 2H that is more stable in the acidic media . The overall plausible reaction sequence is shown below, where the superoxo and peroxo species bear their residual charges and RSH denotes all the three thiols in general.…”

“…The superoxo complex, μ‐amido‐μ‐superoxobis[tetraamminecobalt(III)] tetranitrare ( 1 ) was synthesized using a literature process and recrystallized from 0.5% HNO 3 . The complex 1 was characterized by elemental analysis, FTIR and Raman Spectroscopy.…”

Kinetics and Mechanism of Oxidation of S2O32− by a Co‐Bound μ‐Amido‐μ‐Superoxo Complex

“…The metallo‐superoxide complex, viz. μ‐amido‐μ‐superoxo‐bis[tetraaminecobalt(III)] tetranitrate, [(NH 3 ) 4 Co III (μ‐NH 2 ,μ‐O 2 )Co III (NH 3 ) 4 ](NO 3 ) 4 ( 1 ), and the aqueous solution of NaS 2 O 3 were prepared following the literature processes . The details of the materials used for the title study is provided in the Supporting Information.…”

“…Complex 1 was characterized from its FTIR spectrum (Fig. S1 in the Supporting Information; details are given in the Supporting Information), and the purity of 1 was determined from its characteristic UV–vis absorption at 700 nm ( ε in M −1 cm −1 , found 300; reported 306 ). The details of the instrumental techniques used for the title study is also provided in the Supporting Information.…”