About the kinetics and mechanism of the reactions of 4-(2-pyridylazo) resorcinol, with Zn2+, Cu2+ and Zn2+ +Cu2+ equimolar mixtures, in aqueous solutions
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Abstract
Cu 2+ and Zn 2+ +Cu 2+ equimolar mixtures were studied. The reactions were performed in aqueous solution
(pH = 8.5, borate buffer) and monitored spectrophotometrically at 500 nm using stopped-flow technique.
Spectral and kinetic data indicate that the Zn 2+ +Cu 2+ equimolar mixture behaves as an unique species
and it can be attributed to the interactions of Zn 2+ and of Cu 2+ with water molecules in the aqueous
solution. A mechanism is proposed and the rate constants are calculated.
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References
CHENG, K. L.; UENO, K.; IMAMURA, T. R. Hand-
book of organic analytical reagents. Flórida: CRC Press,
p. 195.
COLSON, S. D.; DUNNING JR., T. H. The Structure of
natures solvent: water. Science, v. 265, n. 5168, p. 43-44,
EIGEN, M. Fast elementary steps in chemical analysis.
Pure Appl. Chem., v. 6, n. 2, p. 97-115, 1963.
GOURBATSIS, S.; HADJILIADIS, N.; PERLEPES, S.
P.; GAROUFS, A.; BUTLER, I. S. Structural and spectro-
scopic characterization of a cationic aquanitrato copper(II)
complex with the tetradentate Schiff-base ligand N,N’-
bis[1-(2-pyridyl)ethylidene]ethane-1,2-diamine. Transition
Met. Chem., v. 23, n. 5, p. 599-604, 1998.
HUBBARD, C. D.; PACHECO, D. The kinetics of the
reactions of 1-(2-Pyridylazo)-2-naphtol with the ions of
nickel(II), copper(II) and zinc(II). J. Inorg. Nucl. Chem.,
v. 39, n. 1373-1375, 1977.
JAMES, D. W. Spectroscopic studies of ion-ion-sol-
vent interaction in solutions containing oxyanions. In:
LIPPARD, S. J. (Ed.). Progress in inorganic chemistry.
New York: John Wiley, 1985. v. 33, p. 353-391.
ROSSI, A. V.; DAVANZO, C. U.; TUBINO, M. The
structure of liquid water in aqueous solutions: a proposed
model from near and mid infrared spectroscopy. J. Braz.
Chem. Soc., v. 7, n. 6, p. 403-410, 1996.
ROSSI, A. V.; ROHWEDDER, J. J .R.; TUBINO, M. A
low cost stopped flow system. Lab. Microcomputer, v. 13,
n. 2-4, p. 67-69, 1994.
ROSSI, A. V.; TUBINO, M. Kinetics and mechanism of
the reaction of zincon, o-[1-(2-hydroxy-5-sulfophenyl)-
-phenyl-5-formazane] benzoic acid, with Zn2+, Cu2+ and
[Zn2+ + Cu2+] equimolar mixtures. J. Braz. Chem. Soc., v.
, n. 3, p. 161-168, 1996.
SHIBATA, S. Chelates in analytical chemistry. New
York: Marcel Dekker, 1972. v. 4, p. 207.
TUBINO, M. Um stopped flow de fácil construção.
Quim. Nova, v. 8, n. 4, p. 324-328, 1985.
TUBINO, M.; ROSSI, A. V. Construção de um aparelho
de fluxo interrompido. Quim. Nova, v. 14, n. 2, p. 109-
, 1991.
VOGEL, A. I. A textbook of quantitative inorganic
analysis including elementary instrumental analysis. Lon-
don: Lowe & Brydone, 1961. p. 358.
WELCHER, F. J. Chemical solutions. New York: D.
Van. Nostrand, 1964. p. 185.