Kinetics, electrochemistry and resonance raman spectra of the (2-mercaptopyridine) (edta)ruthenium(III) complex

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dc.contributor.authorToma, Henrique E.
dc.contributor.authorSantos, Paulo S.
dc.contributor.authorMattioli, Maria P.D. [UNESP]
dc.contributor.authorOliveira, Luiz A.A. [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T03:31:25Z
dc.date.available2014-05-27T03:31:25Z
dc.date.issued1987-12-01
dc.description.abstractThe chemistry of the pentadentate edta complexes of ruthenium(III) and (II) with 2-mercaptopyridine (HSpy) has been investigated based on spectroscopic, kinetic and electrochemical techniques. The reaction of [Ru(III)(edta)H2O]- with HSpy proceeds with a specific rate of 1.05 × 104 M-1 S -1 (25°C, I = 0.10 M, acetate buffer), forming a red complex (λmax = 550 nm) which undergoes a relaxation process as a function of pH, with an apparent pKa = 4.35 and kobs = 0.31 S -1. The second reaction depends on the concentration of HSpy and leads to a stable green product (λmax = 630 mn). A pronounced enhancement has been observed in the Raman spectra of the complexes, particularly in the region of the metal-ligand vibrations. The electronic and resonance Raman spectra are consistent with the coordination of HSpy via the sulfur atom in the red complex, and with a chelate binding in the green species. © 1987.en
dc.description.affiliationInstituto de Química Universidade de São Paulo, Caixa Postal, 20780 São Paulo, SP
dc.description.affiliationInstituto de Química UNESP, Araraquara, SP
dc.description.affiliationUnespInstituto de Química UNESP, Araraquara, SP
dc.format.extent603-611
dc.identifierhttp://dx.doi.org/10.1016/S0277-5387(00)81031-1
dc.identifier.citationPolyhedron, v. 6, n. 3, p. 603-611, 1987.
dc.identifier.doi10.1016/S0277-5387(00)81031-1
dc.identifier.issn0277-5387
dc.identifier.scopus2-s2.0-0000060272
dc.identifier.urihttp://hdl.handle.net/11449/63822
dc.language.isoeng
dc.relation.ispartofPolyhedron
dc.relation.ispartofjcr2.067
dc.relation.ispartofsjr0,472
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.titleKinetics, electrochemistry and resonance raman spectra of the (2-mercaptopyridine) (edta)ruthenium(III) complexen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy

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