KINETIC AND MECHANISTIC STUDY OF DISSOCIATION OF COPPER(II) COMPLEX WITH 14-MEMBERED TETRAAZAMACROCYCLE LIGAND CONTAINING PYRIDINE AND N-CARBOXYMETHYL ARMS
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
KINETIC AND MECHANISTIC STUDY OF DISSOCIATION OF COPPER(II) COMPLEX WITH 14-MEMBERED TETRAAZAMACROCYCLE LIGAND CONTAINING PYRIDINE AND N-CARBOXYMETHYL ARMS
Popis výsledku v původním jazyce
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
Název v anglickém jazyce
KINETIC AND MECHANISTIC STUDY OF DISSOCIATION OF COPPER(II) COMPLEX WITH 14-MEMBERED TETRAAZAMACROCYCLE LIGAND CONTAINING PYRIDINE AND N-CARBOXYMETHYL ARMS
Popis výsledku anglicky
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
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CA - Anorganická chemie
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
N - Vyzkumna aktivita podporovana z neverejnych zdroju
Ostatní
Rok uplatnění
2008
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Collection of Czechoslovak Chemical Communications
ISSN
0010-0765
e-ISSN
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Svazek periodika
73
Číslo periodika v rámci svazku
2
Stát vydavatele periodika
CZ - Česká republika
Počet stran výsledku
16
Strana od-do
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Kód UT WoS článku
000253884000009
EID výsledku v databázi Scopus
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