Kinetics and mechanisms of complex formation of gallium(III) and indium(III). The reactions with 4-(2-pyridylazo)resorcinol in water and other mixed solvents

Authors

Edoardo Mentasti, Università degli Studi di Torino
Claudio Baiocchi, Università degli Studi di Torino
Louis J. Kirschenbaum, University of Rhode Island

Document Type

Article

Date of Original Version

1-1-1985

Abstract

The reactions of 4-(2-pyridylazo)resorcinol (H2 par) with Ga^III and In^III have been studied in water and aqueous mixtures with methanol, acetonitrile, dimethyl sulphoxide, and NN-dimethylformamide at 25.0 °C and / 0.80 mol dm^-3 (NaClO4). The equilibrium constant, Kc, for M(Hpar)²⁺ formation (M = In or Ga) has been evaluated spectrophotometrically and its variation with the medium composition has been discussed with reference to different properties of the solvents. The kinetics of dissociation of M(Hpar)²⁺ by H⁺ have been investigated. The derived formation rate constants are discussed with reference to the mechanisms which operate for the different reacting metal species.

Publication Title, e.g., Journal

Journal of the Chemical Society, Dalton Transactions

Issue

12

Citation/Publisher Attribution

Mentasti, Edoardo, Claudio Baiocchi, and Louis J. Kirschenbaum. "Kinetics and mechanisms of complex formation of gallium(III) and indium(III). The reactions with 4-(2-pyridylazo)resorcinol in water and other mixed solvents." Journal of the Chemical Society, Dalton Transactions 12 (1985). doi: 10.1039/DT9850002615.