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de Souza H, Faria LFO, Scaldini FM, Diniz R, Edwards HG, de Oliveira LFC. Rhodizonate complexes with transition metal ions: A new vision from an old building block. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Junqueira GM, Rocha WR, De Almeida WB, Dos Santos HF. Theoretical analysis of the oxocarbons: the electronic spectrum of the rhodizonate ion. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2005.01.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Junqueira GM, Rocha WR, De Almeida WB, Dos Santos HF. Theoretical study of oxocarbons: structure and vibrational spectrum of the D6h and C2 forms of the rhodizonate ion. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.theochem.2004.07.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fragmentations of Five-Membered Rings. ADVANCES IN HETEROCYCLIC CHEMISTRY 1998. [DOI: 10.1016/s0065-2725(08)60319-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
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Fabre PL, Castan P, Deguenon D, Paillous N. A photo-oxidation of croconic acid into oxalic acid. CAN J CHEM 1995. [DOI: 10.1139/v95-160] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Croconic acid, H2C5O5, is readily oxidized. This may be attested by decolorization of the solutions and by observation of oxalic acid complexes. The oxidation products are identified by 13C NMR spectroscopy as oxalic and mesoxalic acids, and experimental conditions are specified. The oxidation process requires dioxygen and photons. In parallel, the electrochemical oxidation of croconic acid is studied in aqueous media and in acetonitrile. A potential–pH diagram is drawn. Keywords: croconic acid, oxalic acid, oxidation, electrochemistry, photochemistry.
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Zhao B, Back MH. The flash photolysis of aqueous solutions of rhodizonic and croconic acids. INT J CHEM KINET 1994. [DOI: 10.1002/kin.550260105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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