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2014 | 12 | 1 | 107-114
Tytuł artykułu

Investigations of ternary complexes of Co(II) and Ni(II) with oxydiacetate anion and 1,10-phenanthroline or 2,2′-bipyridine in solutions

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Potentiometric (PT) and conductometric (CT) titration methods have been used to determine the stoichiometry and formation constants in water for a series of ternary complexes of Co(II) and Ni(II) involving the oxydiacetate anion (ODA) and 1,10-phenanthroline (phen) or 2,2′-bipyridine (bipy) ligands, namely [Co(ODA)(phen)(H2O)], [Co(ODA)(bpy)(H2O)], [Ni(ODA)(phen)(H2O)] and [Ni(ODA)(bpy)(H2O)]. The ternary complex formation process was found to take place in a stepwise manner in which the oxydiacetate ligand acts as a primary ligand and the phen or bipy ligands act as auxiliary ones. The stability of the ternary complexes formed is discussed in the relation to the corresponding binary ones. Furthermore, the kinetics of the substitution reactions of the aqua ligands in the coordination sphere of the Ni-ODA and Co-ODA complexes to phen or bipy were studied by the stopped-flow method. The kinetic measurements were performed in the 288–303 K temperature range, at a constant concentration of phen or bipy and at seven different concentrations of the binary complexes (4–7 mM). The influence of experimental conditions and the kind of the auxiliary ligands (phen/bipy) on the substitution rate was discussed. [...]
Wydawca

Czasopismo
Rocznik
Tom
12
Numer
1
Strony
107-114
Opis fizyczny
Daty
wydano
2014-01-01
online
2013-10-27
Twórcy
  • Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland, wdaro@wp.pl
  • Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
  • Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
  • Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
  • Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Gdańsk, 80-952, Gdańsk, Poland
  • Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
Bibliografia
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  • [12] R. Baggio, M.T. Garland, M. Perec, Inorg. Chim. Acta, 310, 103 (2000) http://dx.doi.org/10.1016/S0020-1693(00)00249-8[Crossref]
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-013-0353-x
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