Artículo
Quinic acid and hypervalent chromium: A spectroscopic and kinetic study
Mangiameli, María Florencia; Bellú, Sebastián Eduardo
; Perez Mora, Barbara Edith
; Sala, Luis Federico
; Mamana, Nadia
Fecha de publicación:
08/2018
Editorial:
Royal Society of Chemistry
Revista:
RSC Advances
ISSN:
2046-2069
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The redox reaction between an excess of quinic acid (QA) and CrVI involves the formation of intermediates, namely, CrIV and CrV species, which in turn react with the organic substrates. As observed with other substrates that have already been studied, CrIV does not accumulate during this reaction because of the rate of the reaction. Its rate of disappearance is several times higher than that of the reaction of CrVI or CrV with QA. Kinetic studies indicate that the redox reaction proceeds via a combined mechanism that involves the pathways CrVI → CrIV → CrII and CrVI → CrIV → CrIII, which is supported by the observation of superoxo-CrIII (CrO2 2+) ions, free radicals, and oxo-CrV species as intermediates and the detection of CrVI ester species. The present study reports the complete rate laws for the QA/chromium redox reaction.
Palabras clave:
Quinic acid
,
Chromium
,
kinetics mechanism
,
spectroscopy
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos(IQUIR)
Articulos de INST.DE QUIMICA ROSARIO
Articulos de INST.DE QUIMICA ROSARIO
Citación
Mangiameli, María Florencia; Bellú, Sebastián Eduardo; Perez Mora, Barbara Edith; Sala, Luis Federico; Mamana, Nadia; Quinic acid and hypervalent chromium: A spectroscopic and kinetic study; Royal Society of Chemistry; RSC Advances; 8; 51; 8-2018; 29356-29367
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