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dc.contributor.authorDag, Ö.en_US
dc.contributor.authorYaman, S. Ö.en_US
dc.contributor.authorÖnal, A. M.en_US
dc.contributor.authorIsci, H.en_US
dc.date.accessioned2016-02-08T10:34:26Z
dc.date.available2016-02-08T10:34:26Z
dc.date.issued2001en_US
dc.identifier.issn1470-479X
dc.identifier.urihttp://hdl.handle.net/11693/24794
dc.description.abstractElectrochemical and chemical oxidation of S2COEt−, Ni(S2COEt)2, and [Ni(S2COEt)3]− have been studied by CVand in situ UV-VIS spectroscopy in acetonitrile. Cyclic voltammograms of S2COEt− and Ni(S2COEt)2 display one (0.00 V) and two (0.35 and 0.80 V) irreversible oxidation peaks, respectively, referenced to an Ag/Ag+ (0.10 M) electrode. However, the cyclic voltammogram of [Ni(S2COEt)3]− displays one reversible (−0.15 V) and two irreversible (0.35, 0.80 V) oxidation peaks, referenced to an Ag/Ag+ electrode. The low temperature EPR spectrum of the oxidatively electrolyzed solution of (NEt4)[Ni(S2COEt)3] indicates the presence of [NiIII(S2COEt)3], which disproportionates to Ni(S2COEt)2, and the dimer of the oxidized ethylxanthate ligand, (S2COEt)2 ((S2COEt)2 = C2H5OC(S)SS(S)COC2H5), with a second order rate law. The final products of constant potential electrolysis at the first oxidation peak potentials of S2COEt−, Ni(S2COEt)2, and [Ni(S2COEt)3]− are (S2COEt)2; Ni2+(sol) and (S2COEt)2; and Ni(S2COEt)2 and (S2COEt)2, respectively. The chemical oxidation of S2COEt− to (S2COEt)2, and [Ni(S2COEt)3]− to (S2COEt)2 and Ni(S2COEt)2 were also achieved with iodine. The oxidized ligand in the dimer form can be reduced to S2COEt− with CN− in solution.en_US
dc.language.isoEnglishen_US
dc.source.titleJournal of the Chemical Society, Dalton Transactionsen_US
dc.relation.isversionofhttps://doi.org/10.1039/B105683Men_US
dc.subjectAcetonitrileen_US
dc.subjectCyclic voltammetryen_US
dc.subjectDimersen_US
dc.subjectElectrochemical electrodesen_US
dc.subjectElectrochemistryen_US
dc.subjectElectrolysisen_US
dc.subjectOxidationen_US
dc.subjectParamagnetic resonanceen_US
dc.subjectSolution miningen_US
dc.subjectUltraviolet spectroscopyen_US
dc.subjectSpectroelectrochemistryen_US
dc.subjectNickel compoundsen_US
dc.titleSpectroelectrochemistry of potassium ethylxanthate, bis(ethylxanthato)nickel(II) and tetraethylammonium tris(ethylxanthato)-nickelate(II)en_US
dc.typeArticleen_US
dc.departmentDepartment of Chemistry
dc.citation.spage2819en_US
dc.citation.epage2824en_US
dc.citation.issueNumber19en_US
dc.identifier.doi10.1039/b105683men_US
dc.publisherRoyal Society of Chemistryen_US


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