1964
DOI: 10.1021/ic50013a018
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Abstract: The slow decomposition of manganese(III) ethylenediaminetetraacetate complex was studied by spectrophotometric methods. The observed kinetics were explained by assuming three parallel reactions all of which were first order in the complex concentration when above 2 mmoles/l. The rate law was found to be: decomposition rate), with rate constants h = 0.60 sec."1 M~\ h2 = 1.70 X 10-6 sec.-1, h2 = 2.62 X 10_8sec. ~l M~l, Kz -0.51 X 10-3 M. The products of all the steps were found to be carbon dioxide, formaldehyde… Show more

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Cited by 27 publications
(24 citation statements)
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“…The most characteristic part of the chromium(III) spectrum is the two d-d transitions observable in the 350-650 nm region [32]. Our k max values are in good agreement with the literature values [28,29]. These results indicate that EDTA coordinates with the chromium(III) species.…”
Section: Product Identificationsupporting
confidence: 92%
See 1 more Smart Citation
“…The most characteristic part of the chromium(III) spectrum is the two d-d transitions observable in the 350-650 nm region [32]. Our k max values are in good agreement with the literature values [28,29]. These results indicate that EDTA coordinates with the chromium(III) species.…”
Section: Product Identificationsupporting
confidence: 92%
“…It was also observed that the yellow reaction mixture became pink immediately in the presence of manganese(II). Thus, we conclude that the new spectrum ( Figure 1B) is that of the manganese(III)-EDTA complex with k max ¼ 500 nm [29,30]. On the other hand, the band at 725 nm is assigned to the chromium(V)-EDTA complex [31].…”
Section: Product Identificationmentioning
confidence: 89%
“…Using oxidants such as MnO 2 and MnO 4 , Mn(III) complexes with EDTA, EDTMP, and NTMP have been synthesized (Hamm and Suwyn 1967;Kurochkina et al 1978;Schroeder and Hamm 1964). All such Mn(III) complexes undergo intramolecular electron transfer and degradation of the coordinated chelating agent, even under room temperature, near neutral pH conditions.…”
Section: Introductionmentioning
confidence: 98%
“…The decomposition kinetics of manganese(III) EDTA complexes in the pH range 2-4.4 was studied by Schroeder and Hamm (25). Their work demonstrated that the rate of manganese(III) EDTA complex decomposition was pHdependent and could be fit by a three-term rate law, representing three pathways: reduction of the Mn(III) by excess HEDTA 3-, reduction of Mn(III) by internal electron transfer, and reduction of Mn(III) by a more-protonated excess EDTA species, e.g, H2EDTA 2-.…”
Section: Introductionmentioning
confidence: 99%