ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE

The electrochemical behavior of binuclear ruthenium(II) complexes of the type [{(arene)RuCl2}2] where arene = benzene (1), toluene (2), p-cymene (3) and hexamethylbenzene, (HMB) (4), have been studied by cyclic voltammetry, coulometry and voltammetry with rotating disk and ring-disk electrodes. Thes...

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Autores principales:	Arancibia,Verónica, Valderrama,Mauricio, Contreras,Raúl, Muñoz,Patricio
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2003
Materias:	Ruthenium complexes Ring-disk voltammetry Conditional rate constants Charge transfer coefficient
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400015
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spelling	oai:scielo:S0717-970720030004000152004-04-26ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODEArancibia,VerónicaValderrama,MauricioContreras,RaúlMuñoz,Patricio Ruthenium complexes Ring-disk voltammetry Conditional rate constants Charge transfer coefficient The electrochemical behavior of binuclear ruthenium(II) complexes of the type [{(arene)RuCl2}2] where arene = benzene (1), toluene (2), p-cymene (3) and hexamethylbenzene, (HMB) (4), have been studied by cyclic voltammetry, coulometry and voltammetry with rotating disk and ring-disk electrodes. These compounds undergo electrochemical quasi-reversible reduction in dimethylsulphoxide (DMSO) and acetonitrile (MeCN). The ruthenium(I) species formed react in a very fast chemical reaction (EC mechanisms), although the rate constants of electrochemical and chemical processes are different for the arenes studied. Conditional rate constants (k) and charge transfer coefficients (a ) for the cathodic reactions were determined by rotating disk techniques, and the kinetic collection efficiency (Nk) was determined with a rotating ring-disk electrode. On the other hand, the binuclear complexes 1 and 2 are quasi-reversibly oxidized in MeCN solution in two electron steps yielding binuclear Ru(III) species, while complex 3 is partially oxidized to give a mixture of products, and complex 4 generates a very unstable species, which chemically returns to the starting reduced complexinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.48 n.4 20032003-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400015en10.4067/S0717-97072003000400015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ruthenium complexes Ring-disk voltammetry Conditional rate constants Charge transfer coefficient
spellingShingle	Ruthenium complexes Ring-disk voltammetry Conditional rate constants Charge transfer coefficient Arancibia,Verónica Valderrama,Mauricio Contreras,Raúl Muñoz,Patricio ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE
description	The electrochemical behavior of binuclear ruthenium(II) complexes of the type [{(arene)RuCl2}2] where arene = benzene (1), toluene (2), p-cymene (3) and hexamethylbenzene, (HMB) (4), have been studied by cyclic voltammetry, coulometry and voltammetry with rotating disk and ring-disk electrodes. These compounds undergo electrochemical quasi-reversible reduction in dimethylsulphoxide (DMSO) and acetonitrile (MeCN). The ruthenium(I) species formed react in a very fast chemical reaction (EC mechanisms), although the rate constants of electrochemical and chemical processes are different for the arenes studied. Conditional rate constants (k) and charge transfer coefficients (a ) for the cathodic reactions were determined by rotating disk techniques, and the kinetic collection efficiency (Nk) was determined with a rotating ring-disk electrode. On the other hand, the binuclear complexes 1 and 2 are quasi-reversibly oxidized in MeCN solution in two electron steps yielding binuclear Ru(III) species, while complex 3 is partially oxidized to give a mixture of products, and complex 4 generates a very unstable species, which chemically returns to the starting reduced complex
author	Arancibia,Verónica Valderrama,Mauricio Contreras,Raúl Muñoz,Patricio
author_facet	Arancibia,Verónica Valderrama,Mauricio Contreras,Raúl Muñoz,Patricio
author_sort	Arancibia,Verónica
title	ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE
title_short	ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE
title_full	ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE
title_fullStr	ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE
title_full_unstemmed	ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE
title_sort	electrochemical behavior of [{(arene)ruci2}2] complexes, determination of kinetic parameters using the rotating ring-disk electrode
publisher	Sociedad Chilena de Química
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400015
work_keys_str_mv	AT arancibiaveronica electrochemicalbehaviorofareneruci22complexesdeterminationofkineticparametersusingtherotatingringdiskelectrode AT valderramamauricio electrochemicalbehaviorofareneruci22complexesdeterminationofkineticparametersusingtherotatingringdiskelectrode AT contrerasraul electrochemicalbehaviorofareneruci22complexesdeterminationofkineticparametersusingtherotatingringdiskelectrode AT munozpatricio electrochemicalbehaviorofareneruci22complexesdeterminationofkineticparametersusingtherotatingringdiskelectrode
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ELECTROCHEMICAL BEHAVIOR OF [{(ARENE)RUCI2}2] COMPLEXES, DETERMINATION OF KINETIC PARAMETERS USING THE ROTATING RING-DISK ELECTRODE

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