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Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/123456789/10371

Título : Speciation of the nickel(II) complexes with oxalic and malonic acids studied in 1.0 mol dmZ3 NaCl at 25 C
Autor : PEÑUELA, JORGE
Martínez, José Daniel
Araujo, Mary Lorena
BRITO, FELIPE
LUBES, GIUSEPPE
RODRIGUEZ, MILDRED
LUBES, VITO
Palabras clave : Nickel(II) complexes;
Oxalic acid; Malonic acid;
Potentiometric studies;
Speciation
Fecha de publicación : 23-Jun-2015
Resumen : In this article, we present the results of the speciation of the binary nickel(II)-oxalic acid (H2L) and nickel(II)-malonic acid (H2L) systems studied by electromotive forces measurements emf (H) using 1.0 moldm 3 NaCl as the ionic medium at 25 C. The experimental data were analyzed by a computational least-squares program LETAGROP/FONDO, a version of the LETAGROP program, written to analyze regular formation function and reduced formation functions, taking into account the hydrolysis of the nickel(II) cation and the acid base reactions of the ligands which were kept fixed during the analysis. In the nickel(II)-oxalic acid system the complexes [NiHL]þ, [NiL], [Ni(OH)L] , and [NiL2]2 were observed and for the nickel(II)- malonic acid system the complexes [NiHL]þ, [NiL], [Ni(OH)L] , and [Ni(OH)2L]2 were detected. The stability constants were determined and the species distribution diagrams as a function of pH are briefly discussed.
URI : http://saber.ucv.ve/jspui/handle/123456789/10371
ISSN : 0095-8972
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Journal of Coordination Chemistry Vol. 64, No. 15, 10 Augu st 2011, 2698_2705 (1).pdf283.55 kBAdobe PDFVisualizar/Abrir

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