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Issue 2, 2009
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Two-electron oxidation of N,N,N′,N′-tetramethylphenylenediamine with a chromium(V) salen complex

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Abstract

The oxidation of tetramethylphenylenediamine (TMPD) with (salen)CrVO+ generates initially the 2-electron product TMPD2+, followed by the reaction with excess TMPD to yield the radical cation, TMPD˙+. The kinetics of both TMPD/(salen)CrVO+ and TMPD/TMPD2+ reactions are acid-dependent, with TMPD being the most reactive form, and the doubly protonated TMPDH22+ exhibiting no discernible reactivity toward either (salen)CrVO+ or TMPD2+. The specific rate constants for the individual reactions are: TMPD/(salen)CrVO+, k = (6.28 ± 0.50) × 109 M−1 s−1, TMPDH+/(salen)CrVO+, (3.89 ± 0.31) × 105, TMPD/TMPD2+, (7.61 ± 0.42) × 108, and TMPDH+/TMPD2+, (3.46 ± 0.22) × 104.

Graphical abstract: Two-electron oxidation of N,N,N′,N′-tetramethylphenylenediamine with a chromium(v) salen complex

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Publication details

The article was received on 01 Jul 2008, accepted on 15 Sep 2008 and first published on 05 Nov 2008


Article type: Paper
DOI: 10.1039/B811140E
Citation: Dalton Trans., 2009,0, 318-321
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    Two-electron oxidation of N,N,N′,N′-tetramethylphenylenediamine with a chromium(V) salen complex

    G. Chaka and A. Bakac, Dalton Trans., 2009, 0, 318
    DOI: 10.1039/B811140E

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