Valence-State Alternatives in Diastereoisomeric Complexes [(acac)2Ru(.mu.-QL)Ru(acac)2]n (QL2- = 1,4-Dioxido-9,10-anthraquinone, n = +2, +1, 0, -1, -2)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F08%3A00310640" target="_blank" >RIV/61388955:_____/08:00310640 - 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
Valence-State Alternatives in Diastereoisomeric Complexes [(acac)2Ru(.mu.-QL)Ru(acac)2]n (QL2- = 1,4-Dioxido-9,10-anthraquinone, n = +2, +1, 0, -1, -2)
Original language description
The title complexes were obtained in neutral form (n = 0) as rac (1) and meso isomers (2). 2 was crystallized for X-ray diffraction and its temperature-dependent magnetism studied. It contains two antiferromagnetically coupled ruthenium(III) ions, bridged by the quinizarine dianion QL2- (quinizarine = 1,4-dihydroxy-9,10-anthraquinone). The potential of both the ligand (QLo -> QL4-) and the metal complex fragment combination [(acac)2RuII]2 -> {[(acac)2RuIV]2}4+ to exist in five different redox states creates a large variety of combinations, which was assessed for the electrochemically reversibly accessible 2+, 1+, 0, 1-, 2- forms using cyclic voltammetry as well as EPR and UV-vis-NIR spectroelectrochemistry. Metal-based oxidation of [(acac)2RuIII(.mu.-QL2-)RuIII(acac)2] to a mixed-valent intermediate and ligand-centered reduction to a radical complex is assumed.
Czech name
Alternativy valenčních stavů v diastereoisomerických komplexech [(acac)2Ru(.mu.-QL)Ru(acac)2]n (QL2- = 1,4-Dioxido-9,10-anthraquinone, n = +2, +1, 0, -1, -2)
Czech description
Titulní komplexy byly získány v neutrální formě (n = 0 ) jako rac (1) a meso izomery (2). 2 byl vykrystalován pro rentgenovou difrakci a byl studován jeho teplotně závislý magnetismus. Obsahuje dva antiferromagneticky spojené ruthenium(III) ionty, přemostěné quinizarinovým dianionem QL2- (quinizarin = 1,4-dihydroxy-9,10-anthraquinone). Možnost ligandu (QLo -> QL4-) i komplexního kovového fragmentu [(acac)2RuII]2 -> {[(acac)2RuIV]2}4+ existovat v pěti různých redox stavech vytváří velkou rozmanitost kombinací, které byly vyhodnoceny s použitím cyklické voltametrie, jakož i EPR a UV-VIS-NIR spektroelektrochemií pro electrochemicky reversibilně dostupné 2+, 1+, 0, 1-, 2- formy. Lze usuzovat, že oxidace [(acac)2RuIII(.mu.-QL2-) RuIII(acac)2] probíhá na kovu za tvorby meziproduktu se smíšenou valencí, redukce je soustředěna na ligandu a vzniká radikálový komplex.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
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
Inorganic Chemistry
ISSN
0020-1669
e-ISSN
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Volume of the periodical
47
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
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UT code for WoS article
000256591400026
EID of the result in the Scopus database
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