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Kinetics and mechanism of anation of hexaaquochromium(III) by 2-aminopyridine

Authors:

Pompa De Gauri S. De

Affiliation:

1. Department of Chemistry, University of Burdwan, 713 104, Burdwan, India

Abstract:

The kinetics of substitution of aqua ligands from the hexaaquochromium(III) ion by 2-aminopyridine (2-ampyH⁺) in aqueous medium has been studied spectrophotometrically in the 40–55° C range. The rate law involving the outer sphere complex formation has been established at pH 2.7 as

$begin{gathered} d[Cr(2 - ampy)_2 (H_2 O)_4^{3 + } ]/dt hfill {text{ }} = frac{{k_a K_{osc} [Cr(H_2 O)_6^{3 + } ]_{tot} [2 - ampyH^ + ]}}{{1 + K_{osc} [2 - ampyH^ + ]}} hfill end{gathered}$

Keywords:
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