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Issue 3, 2002
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The electrooxidation of the tetraphenylborate ion revisited

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Abstract

The electrochemistry of the tetraphenylborate ion, BPh4, has been studied by cyclic voltammetry and coulometry in water, methanol, ethanol, acetonitrile, acetone, dimethylformamide and dichloromethane under an N2 atmosphere. While a one-electron and somewhat irreversible oxidation (with an E1/2 of 0.87 V vs. SCE at a glassy carbon electrode) is observed in dichloromethane, eqn. (i), the oxidation is somewhat complicated in all other solvents by the occurrence of several consecutive reactions. Epa, the anodic peak potential in cyclic voltammetry, changes from 0.41 V vs. SCE in water to 0.94 V vs. SCE in dimethylformamide at a glassy carbon electrode. The variation in Epa with solvent (S) is explained by invoking reaction (ii). The coulometric results in solvents other than dichloromethane indicate a disproportionation of S–BPh3, eqn. (iii).

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Publication details

The article was received on 17 Jul 2001, accepted on 12 Nov 2001 and first published on 28 Feb 2002


Article type: Paper
DOI: 10.1039/B106356C
Citation: New J. Chem., 2002,26, 367-371
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    The electrooxidation of the tetraphenylborate ion revisited

    P. K. Pal, S. Chowdhury, M. G. B. Drew and D. Datta, New J. Chem., 2002, 26, 367
    DOI: 10.1039/B106356C

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