Kinetics of aquation of [Co(ODA)(H2O)3] induced by Fe(III)

Dariusz Wyrzykowski , Dagmara Jacewicz , Joanna Pranczk , Natalia Sobolewska , Aleksandra Tesmar , Lech Chmurzyński

Abstract

The aquation reaction of the oxydiacetate cobalt(II) complex, namely [Co(ODA)(H2O)2]•H2O (ODA = oxydiacetate), induced by the Fe(III) ions as the promoter has been studied spectrophotometrically (UV-Vis). Kinetic measurements were carried out in the 283.15 - 303.15 K temperature range and at a constant ionic strength of 1.0 M (NaNO3). The observed rate constants were computed by a program based on global analysis. Furthermore, the reaction activation parameters were determined using the Arrhenius and Eyring equations. The changes in the enthalpy, entropy as well as activation energy barriers were calculated in the range of 0.00125 M – 0.125 M of the Fe(III) ion concentration. Based on kinetic data a mechanism for the aquation of the [Co(ODA)(H2O)3] complex has been proposed.
Author Dariusz Wyrzykowski (FCh / DGICh / LPCC)
Dariusz Wyrzykowski,,
- Laboratory of Physicochemistry of Coordination Complexes
, Dagmara Jacewicz (FCh / DGICh / LPCC)
Dagmara Jacewicz,,
- Laboratory of Physicochemistry of Coordination Complexes
, Joanna Pranczk (FCh / DGICh / LPCC)
Joanna Pranczk,,
- Laboratory of Physicochemistry of Coordination Complexes
, Natalia Sobolewska (FCh / DGICh / LPCC)
Natalia Sobolewska,,
- Laboratory of Physicochemistry of Coordination Complexes
, Aleksandra Tesmar (FCh / DGICh / LPCC)
Aleksandra Tesmar,,
- Laboratory of Physicochemistry of Coordination Complexes
, Lech Chmurzyński (FCh / DGICh / LPCC)
Lech Chmurzyński,,
- Laboratory of Physicochemistry of Coordination Complexes
Journal seriesOpen Chemistry, ISSN , e-ISSN 2391-5420, (B 14 pkt)
Issue year2015
Vol13
No1
Pages224-228
Publication size in sheets0.5
Keywords in Englishcobalt(II) complex, oxydiacetate, kinetics of aquation reaction
DOIDOI:10.1515/chem-2015-0027
URL http://dx.doi.org/10.1515/chem-2015-0027
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa - Użycie Niekomercyjne - Bez utworów zależnych (CC-BY-NC-ND); with publication
Score (nominal)14
ScoreMinisterial score = 14.0, 03-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 14.0, 03-12-2017, ArticleFromJournal
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