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Mechanism of electron transfer reaction of ternary nitrilotriacetatocobalt(II) complexes involving succinate and malonate as secondary ligands

“…Alternatively, the oxidation process may be inner sphere, but because the rate of ring closure is faster than that of oxidation the initial cobalt(III) product was not observed. Furthermore, this is consistent with inner‐sphere oxidations, which are generally proposed for N ‐bromosuccinamide reactions 28–30. The relatively faster rates of ring closure, compared to the oxidation step, in [Co II (nta)(S)(H 2 O) 2 ] 3− and [Co II (nta)(M)(H 2 O)] 3− reactions, tend to preclude observation of the initial product.…”

Kinetics and mechanism of oxidation of aquaethylenediaminetetraacetatocobaltate(II) by N-bromosuccinimide in aqueous acidic solution

“…N-bromosuccinimide (NBS) has been used on a large scale as a brominating and oxidizing agent for organic compounds, but its use to oxidize inorganic compounds and metal complexes has, until recently, received little attention [1][2][3][4][5][6][7][8][9][10][11][12][13]. 2 ] -(NTA = nitrilotriacetate) by NBS have been studied in aqueous medium [5][6][7].…”

“…2 ] -(NTA = nitrilotriacetate) by NBS have been studied in aqueous medium [5][6][7]. These reactions were found to proceed via the formation of an initial cobalt(III) product, which converted slowly to the final cobalt(III) product.…”

Kinetics and Mechanism of Oxidation of a Ternary Complex Involving Dipicolinatochromium(III) and Proline by N-bromsuccinimide

“…Oxidation of metal complexes by NBS has received limited attention [6][7][8][9][10][11][12][13][14][15][16][17][18]. NBS has been used to oxidize chromium(III) complexes [8][9][10][11][12][13][14].…”

“…-(M = malonate) by NBS have been reported[15,16]. It was found that succinate and malonate as a secondary ligand, make the ternary complexes more stable towards oxidation by NBS than is the case for the binary complex [Co II (NTA)(H 2 O) 2 ] -[17]. Also, oxidation of [Cr III (Dpc)(Asp)(H 2 O) 2 ] -(Dpc = dipicolinic acid and Asp = DL-aspartic acid) was studied kinetically[18]; the value of the intermolecular electron transfer rate ]is more than the value for the oxidation of [Cr III (DPA)2 (H 2 O) 2 ] -.…”