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A Fast Kinetic Study of the Formation and Decay of N,N,N',N'-Tetramethyl-p-phenylenediamine Radical Cation in Aqueous Solution

DOI: 10.1039/f19868200359

Source and publish data:

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 359 - 364 (1986)

Update date:2022-08-11

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Authors:

Maruthamuthu, PichaiMaruthamuthu, Pichai

Venkatasubramanian, LakshmananVenkatasubramanian, Lakshmanan

Dharmalingam, PeriasamyDharmalingam, Periasamy

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Article abstract of DOI:10.1039/f19868200359

The oxidation of N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) by S2O82-, HSO5-, H2O2, MnO4-, Cr2O72-, CeIV and molecular bromine and iodine has been studied.The fast kinetics of formation of the diamine radical cation and its further oxidation at a longer time scale, or with a higher concentration of the oxidants at a shorter time scale, were studied by following the absorption and decay of the radical cation, TMPD+ at 565 or 615 nm.The reaction was found to be second-order overall, but first-order with respect to and .The values of the second-order rate constants for the formation and decay of the radical cation were found to be in line with the oxidation potentials of the oxidants.Reduction of the radical cation by dithionite was found to regenerate the diamine, and the rate constant for this reaction was also determined.

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Product name:N,N,N',N'-Tetramethyl-1,4-phenylenediamine

Cas No:100-22-1

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