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http://hdl.handle.net/10553/49126
Title: | Spectrophotometric study of the complexation equilibria and the determination of palladium(II) with 4-(5′-methyl-3′-isoxazolylazo)-resorcinol | Authors: | Trujillo, J. P.Pérez Sosa, Z. Arias, J. J. |
UNESCO Clasification: | 2301 química analítica | Issue Date: | 1989 | Publisher: | 0277-5387 | Journal: | Polyhedron | Abstract: | The complexation equilibria between PdII and 4-(5′-methyl-3′-isoxazolylazo)-resorcinol (MIAR) have been studied and the existence of the species PdH2R2+, PdHR+, PdR and PdOHR− have been established; the acid dissociation constants for the first three are pK121a = 2.65±0.16, pK111a = 7.09±0.15 and pK101a = 9.57±0.20. The ternary complex PdII-MIAR-hexamine has also been studied. A new method for the determination of 0.4–4.0 ppm Pd (ε = 1.8 x 104 1 Mol−1 cm−1) has been developed and applied to samples of hydrogenation catalysts. | URI: | http://hdl.handle.net/10553/49126 | ISSN: | 0277-5387 | DOI: | 10.1016/S0277-5387(00)86503-1 | Source: | Polyhedron [ISSN 0277-5387], v. 8, p. 197-202 |
Appears in Collections: | Artículos |
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