KINETICS OF INTERACTION OF NICKEL(II) WITH 2-PICOLYLMETHYLAMINE

Autor:	W. Palaitis, C. D. Hubbard
Rok vydání:	1979
Předmět:	chemistry.chemical_classification Aqueous solution Base (chemistry) Ligand Kinetics Inorganic chemistry chemistry.chemical_element Ion Nickel Reaction rate constant chemistry Ionic strength Materials Chemistry Physical and Theoretical Chemistry
Zdroj:	Journal of Coordination Chemistry. 9:107-110
ISSN:	1029-0389 0095-8972
DOI:	10.1080/00958977908076513
Popis:	The kinetics of the reaction in aqueous solution between 2-picolylmethylamine, (PMA), and nickel(II) ions have been studied using the stopped-flow technique. Formation of the 1:1 complex is second-order in the pH range of 5 to 7. The rate constant for reaction of the neutral ligand form is 2.9 × 104 M−1 s−1 at 25.0° at an ionic strength of 0.3. This value is compared and contrasted with rates of substitution of water on nickel(II) ions by other ligands, and the rate enhancement may be explained by the internal conjugate base mechanism. Monoprotonated PMA reacts very much more slowly under identical conditions (∼20 M−1 s−1). This value is consistent with expectation from earlier studies.
Databáze:	OpenAIRE
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