The redox properties of complexes of Pd(II), Cu(II) and Ni(II) with the N,N′-ethylenebis(acetylacetoniminate) ligand, [(acac)2en]2−, have been investigated by cyclic voltammetry, chronoamperometry and controlled potential coulometry in acetonitrile solvent at platinum and mercury electrodes. The one-electron oxidation product of [Pd{(acac)2en}] has been identified as the dimeric cation [Pd{(acac)2en}]22+; the cathodic reduction of the starting complex originates the corresponding Pd1 species, stable only in the voltammetric time-scale. The electrooxidation process of [Cu{(acac)2en}] leads to the short-lived corresponding [CuL]+ species, from which free Cu+ or Cu2+ ions generate, depending on the working potential; the overall cathodic process appears to be rather complicated. The [Ni{(acac)2en}] complex undergoes an irreversible one-electron oxidation in the voltammetric time-scale, while the overall anodic process gives rise to a doubly charged cationic species, from which the parent compound can be electrolytically regenerated. Comparisons with the previously reported voltammetric properties of N,N′-ethylenebis(monothioacetylacetoniminato) metal complexes have been done; the effect on EView the MathML source values of substitution of oxygen for sulphur in the atom donor set is outlined.

Voltammetric behaviour of transition metal complexes with extended - systems schiff base ligands / A., Cinquantini; Seeber, Renato; R., Cini; P., Zanello. - In: JOURNAL OF ELECTROANALYTICAL CHEMISTRY AND INTERFACIAL ELECTROCHEMISTRY. - ISSN 0022-0728. - STAMPA. - 134:(1982), pp. 65-73. [10.1016/S0022-0728(82)85027-4]

Voltammetric behaviour of transition metal complexes with extended - systems schiff base ligands

SEEBER, Renato;
1982

Abstract

The redox properties of complexes of Pd(II), Cu(II) and Ni(II) with the N,N′-ethylenebis(acetylacetoniminate) ligand, [(acac)2en]2−, have been investigated by cyclic voltammetry, chronoamperometry and controlled potential coulometry in acetonitrile solvent at platinum and mercury electrodes. The one-electron oxidation product of [Pd{(acac)2en}] has been identified as the dimeric cation [Pd{(acac)2en}]22+; the cathodic reduction of the starting complex originates the corresponding Pd1 species, stable only in the voltammetric time-scale. The electrooxidation process of [Cu{(acac)2en}] leads to the short-lived corresponding [CuL]+ species, from which free Cu+ or Cu2+ ions generate, depending on the working potential; the overall cathodic process appears to be rather complicated. The [Ni{(acac)2en}] complex undergoes an irreversible one-electron oxidation in the voltammetric time-scale, while the overall anodic process gives rise to a doubly charged cationic species, from which the parent compound can be electrolytically regenerated. Comparisons with the previously reported voltammetric properties of N,N′-ethylenebis(monothioacetylacetoniminato) metal complexes have been done; the effect on EView the MathML source values of substitution of oxygen for sulphur in the atom donor set is outlined.
1982
134
65
73
Voltammetric behaviour of transition metal complexes with extended - systems schiff base ligands / A., Cinquantini; Seeber, Renato; R., Cini; P., Zanello. - In: JOURNAL OF ELECTROANALYTICAL CHEMISTRY AND INTERFACIAL ELECTROCHEMISTRY. - ISSN 0022-0728. - STAMPA. - 134:(1982), pp. 65-73. [10.1016/S0022-0728(82)85027-4]
A., Cinquantini; Seeber, Renato; R., Cini; P., Zanello
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/736467
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