KINETIC AND MECHANISTIC STUDY OF DISSOCIATION OF COPPER(II) COMPLEX WITH 14-MEMBERED TETRAAZAMACROCYCLE LIGAND CONTAINING PYRIDINE AND N-CARBOXYMETHYL ARMS
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F08%3A00033551" target="_blank" >RIV/00216224:14310/08:00033551 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
KINETIC AND MECHANISTIC STUDY OF DISSOCIATION OF COPPER(II) COMPLEX WITH 14-MEMBERED TETRAAZAMACROCYCLE LIGAND CONTAINING PYRIDINE AND N-CARBOXYMETHYL ARMS
Original language description
The kinetics of acid-catalyzed dissociation of the copper(II) complex with 7-methyl-3,7,11,17-tetraazabicyclo[11.3.1]heptadeca-1(17),13,15-triene-3,11-diacetic acid (ac2Me[14]pyN4) at [H+] = 0.05-0.25 M, I = 0.25 M (Na, H)ClO4, and T = 298.16 K was studied with conventional and stopped-flow UV/VIS spectroscopy. Three steps of consecutive complex reaction were observed. The very fast first and second steps characterized by k1 = 70 +/- 10 and k2 = 0.23 +/- 0.01 M-1 s-1 depend on the H+ concentration. Thethird step is very slow, k3 = (1.08 +/- 0.03) * 10-3 s-1, and does not depend on the H+ concentration. Latter rate-determining step involves an isomerisation process forcing the copper(II) ion to leave rapidly the macrocyclic cavity. The reaction mechanism of the complex dissociation has been proposed, taking into account the results obtained for related systems by independent methods: potentiometry, UV/VIS and EPR spectroscopies, X-ray diffraction analysis, and molecular mechanics calcu
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Result continuities
Project
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Continuities
N - Vyzkumna aktivita podporovana z neverejnych zdroju
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Collection of Czechoslovak Chemical Communications
ISSN
0010-0765
e-ISSN
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Volume of the periodical
73
Issue of the periodical within the volume
2
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
16
Pages from-to
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UT code for WoS article
000253884000009
EID of the result in the Scopus database
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