Studies on the kinetics of complexation of seven lanthanide mandelates with 1, 10 - phenanthroline

Article abstract of DOI:10.1080/00945719909349473

The kinetics of the coordination reaction of seven lanthanide (III) ( La, Ce, Pr, Nd, Sm, Eu and Gd) mandelates, LnL₃(H₂CO)₂, with 1, 10-phenanthroline (phen) in methanol-water (3:2 v/v) were studied at 25° C by calorimetric titration. We have evaluated the rate constants of the reactions. A two-steps reaction process in accordance with the rate equation is suggested. The reaction is first-order each in lanthanide mandelate and phen. The variation rule of the rate constants with the atomic numbers or the ionic radii of the lanthanide ions is discussed. It is found that a linear free energy relationship does not exist between the stability constants of the lanthanide-mandelate-phen ternary complex and the rate constants. The influence of other factors upon the reaction rate is also discussed.

Full text of DOI:10.1080/00945719909349473

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Synthesis and Reactivity in
Inorganic and Metal-Organic
Chemistry
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Studies on the Kinetics of
Complexation of Seven
Lanthanide Mandelates with
1,10-Phenanthroline
Yan Ping Ren a & Li Zhang a
a Department of Applied Chemistry , Taiyuan
University of Technology , Taiyuan, 030024, China
Published online: 14 Apr 2008.
To cite this article: Yan Ping Ren & Li Zhang (1999) Studies on the Kinetics of
Complexation of Seven Lanthanide Mandelates with 1,10-Phenanthroline, Synthesis
and Reactivity in Inorganic and Metal-Organic Chemistry, 29:4, 599-606, DOI:
10.1080/00945719909349473
To link to this article: http://dx.doi.org/10.1080/00945719909349473
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