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| Kinetics and Possible Mechanisms o f the Ce(IY) Oxidation of EDTA, CDTA, DTPA and NTA in Perchloric Acid Media  | | | | Abstract
| a m ir B. H a n n a , W i l l i a m R . C a r r o l l , S a l e m A. A t t i g a , a n d W i l l i a m H . W e b b The rates of oxidation of four chelating agents with Ce(IV) in HC104 solutions, have been studied by the stopped-flow technique. The rates first increase with increasing acidity, reach maxima which are characteristic of the chelating agent and the medium, then progressively decrease with further increasing acid concentration. A t their maximum reactivities, the tendencies for oxidation decrease in the following order: 2rans-l,2-dia-minocyclohexane tetraacetic acid (CDTA) > ethylenedinitrilotetraacetic acid (EDTA) > diethylenetriaminepentaacetic acid (DTPA) > nitrilotriacetic acid (NTA). A mech anism for the oxidation of EDTA, involving Ce4+ and Ce(OH)3+ and both unprotonated and monoprotonated chelating agent, is proposed. | | | |
Reference
| (Z. Naturforsch. 30b, 409—415 [1975]; received December 27 1974) | | | |
Published
| 1975 | | | |
Keywords
| Oxidation, Amino Acids, Kinetics, Mechanisms, Cerium(IY) | | | |
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| default:Reihe_B/30/ZNB-1975-30b-0409.pdf | | | | Identifier
| ZNB-1975-30b-0409 | | | | Volume
| 30 | |
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