Kinetics and Mechanism of Ligand Substitutionin Triglycinatovanadium(III) by EDTA and NTA in Aqueous Solutions

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Title:Kinetics and Mechanism of Ligand Substitutionin Triglycinatovanadium(III) by EDTA and NTA in Aqueous Solutions
Creators:
Ikeda, Yasuhisa
Hassan, Refat M.
Abd El-Fattah, Moustafa M.
Park, Yul Y.
Tomiyasu, Hiroshi
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 59, 5, pp. 1077-1085

Abstract

<p>The kinetics of ligand substitution reactions in triglycinatovanadium(III) by EDTA and NTA as multidentate ligands were investigated at a constant ionic strength of 2.5 mol dm<sup>-3</sup> spectrophotometrically. The substitutions were second-order reactions, first order in both reactants. Their rate could be expressed in the form <i>r</i> = <i>k</i> [V(gly)<sub>3</sub>] [EDTA(NTA)] where <i>k</i> = 2.62 .10<sup>-2</sup> and 6.96 .10<sup>-2</sup> mol<sup>-1</sup> dm<sup>3</sup> s<sup>-1</sup> at 25&nbsp;°C for EDTA and NTA, respectively. The results obtained at different pH indicated that [H<sub>2</sub>edta]<sup>2-</sup> and [Hnta]<sup>2-</sup> ions were the most reactive species in the substitution. Kinetic parameters have been evaluated and a tentative mechanism of the reaction has been proposed.

Title:Kinetics and Mechanism of Ligand Substitutionin Triglycinatovanadium(III) by EDTA and NTA in Aqueous Solutions
Creators:
Ikeda, Yasuhisa
Hassan, Refat M.
Abd El-Fattah, Moustafa M.
Park, Yul Y.
Tomiyasu, Hiroshi
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:59
Number:5
Page Range:pp. 1077-1085
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19941077UNSPECIFIED
ID Code:525
Item Type:Article
Deposited On:06 Feb 2009 17:01
Last Modified:06 Feb 2009 16:01

Citation

Ikeda, Yasuhisa; Hassan, Refat M.; Abd El-Fattah, Moustafa M.; Park, Yul Y.; Tomiyasu, Hiroshi (1994) Kinetics and Mechanism of Ligand Substitutionin Triglycinatovanadium(III) by EDTA and NTA in Aqueous Solutions. Collection of Czechoslovak Chemical Communications, 59 (5). pp. 1077-1085. ISSN 0010-0765

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