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Issue 10, 2001
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Reversible solid-state interconversion of rhodizonic acid H2C6O6 into H6C6O8 and the solid-state structure of the rhodizonate dianion C6O62− (aromatic or non-aromatic?)

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Abstract

Anhydrous rhodizonic acid H2C6O6 is obtained by (fully reversible) thermal dehydration of solid 2,3,5,5,6,6-hexahydroxycyclohex-2-ene-1,4-dione, H6C6O8, commonly known as rhodizonic acid dihydrate. Treatment of H6C6O8 with RbOH yields crystals of Rb2C6O6; the oxocarbon dianion C6O62− is shown to possess a flat, benzene-type structure, with C–C bonds shorter than expected for a (non-aromatic) ketonic-type structure.

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Publication details

The article was received on 03 Jul 2001, accepted on 10 Aug 2001 and first published on 04 Sep 2001


Article type: Letter
DOI: 10.1039/B107317F
Citation: New J. Chem., 2001,25, 1221-1223
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    Reversible solid-state interconversion of rhodizonic acid H2C6O6 into H6C6O8 and the solid-state structure of the rhodizonate dianion C6O62− (aromatic or non-aromatic?)

    D. Braga, G. Cojazzi, L. Maini and F. Grepioni, New J. Chem., 2001, 25, 1221
    DOI: 10.1039/B107317F

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