Electrochemical oxidation of benzene and biphenyl in liquid sulfur dioxide: formation of conductive deposits

doi:10.1016/0013-4686(82)80060-1

Electrochimica Acta

Volume 27, Issue 1, January 1982, Pages 61-65

https://doi.org/10.1016/0013-4686(82)80060-1 Get rights and content

Abstract

The electrochemical oxidation of benzene and biphenyl in liquid SO₂ on a platinum electrode results in the formation of passivating films when performed in the presence of a quaternary ammonium perchlorate as a background electrolyte. In contrast, when the electrolyte is a quaternary ammonium tetrafluoroborate, dendrite-like conducting deposits are obtained. Elemental analyses, ir and xps spectra show that the films and deposits are products of the polyphenylene type containing variable amounts of oxygen. The oxidation product of benzene obtained in the presnece of BF₄⁻ is not conductive in the dry state when it is purified and exempt from electrolyte (σ < 10⁻⁸ Ω⁻¹ cm⁻¹), whereas the unpurified product is fairly conductive in the dry state (σ = 10⁻³ Ω⁻¹ cm⁻¹).

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Citation Excerpt :
These can be particularly high when the films partially undergo a further oxidation and incorporate some amount of the supporting electrolyte anions. Polyphenylenes were also prepared by electrochemical means in acidic and aprotic media from benzene, biphenyle and para-terphenyle [11–18]. Most electrogenerated polymers are insoluble, that is why their physico-chemical characterization is difficult.
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Electrochemical oxidation of benzene and biphenyl in liquid sulfur dioxide: formation of conductive deposits

Abstract

J. electroanal. Chem.

Electrochim. Acta

J. electroanal. Chem.

J. electroanal. Chem.

J. electroanal. Chem.

J. electroanal. Chem.

Tetrahedron Lett.

Spectrochim. Acta

C.r. hebd. séanc. Acad. Sci. Paris. C

C.r. hebd. seanc. Acad. Sci., Paris C

Bull. Soc. Chim. Fr.

Bull. Soc. Chim. Fr.

I.S.E. 29th Meeting Extended Abs.