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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064

Abstract

HE, Xiwen; TUBINO, Matthieu  and  ROSSI, Adriana Vitorino. The determination of the stoichiometry of the mixed complex of vanadium with hydrogen peroxide and with 4-(2-Pyridilazo) Resorcinol. Quím. Nova [online]. 2000, vol.23, n.3, pp.316-319. ISSN 0100-4042.  https://doi.org/10.1590/S0100-40422000000300007.

The present study reports details of the stoichiometric characterization of the mixed complex system, V(H2O2)PAR, formed when vanadium adequately reacts with hydrogen peroxide and with 4-(2-Pyridilazo)Resorcinol. Also the presence of polynuclear species was investigated in order to elucidate about unambiguous assignment of the molar absorptivity, stability constant and composition of the complex. Two mathematical treatments methods of the experimental results were employed. From the results it can be concluded that this system corresponds to a mononuclear complex with 1:1:1 stoichiometry.

Keywords : vanadium; PAR; H2O2; complex stoichiometry.

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