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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.
ISSN: 0277-5387
DOI: 10.1016/S0277-5387(00)86503-1
Source: Polyhedron [ISSN 0277-5387], v. 8, p. 197-202
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