Valence structures of the diastereomeric complexes meso- and rac-[Ru-2(acac)(4)(mu-Q)](n) (n=2-, 1-, 0, 1+, 2+) with the multiple quinonoid bridging ligand Q=1,2,4,5-tetraimino-3,6-diketocyclohexane

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F09%3A00336246" target="_blank" >RIV/61388955:_____/09:00336246 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Valence structures of the diastereomeric complexes meso- and rac-[Ru-2(acac)(4)(mu-Q)](n) (n=2-, 1-, 0, 1+, 2+) with the multiple quinonoid bridging ligand Q=1,2,4,5-tetraimino-3,6-diketocyclohexane

Popis výsledku v původním jazyce

Meso- and rac-configurated diastereoisomers [Ru2(acac)4(?-Q)] have been separated and identified as RuII?Q0 species through a crystal structure analysis of the meso form. Cyclic voltammetric and spectroelectrochemical (UV-vis-NIR, IR, EPR) characterisation of the five accessible states (2-, 1-, 0, 1+ and 2+ forms) was performed. Oxidation occurs at the metal ions to produce RuIIRuIII mixed-valent states with corresponding EPR features but without detectable intervalence absorption in the near infrared region. IR-spectroelectrochemistry reveals opposite frequency shifts for the ?(C=O) and ?(NH) stretching vibrations on reduction and oxidation, in agreement with the assumed electronic structure. Reduction leads to strongly stabilised [Ru2(acac)4(?-Q)]- states which show weak NIR shoulders around 1040 nm. The EPR characteristics are remarkably different for the two isomeric monoanions, reflecting presumably flexible geometry and electronic structure.

Název v anglickém jazyce

Valence structures of the diastereomeric complexes meso- and rac-[Ru-2(acac)(4)(mu-Q)](n) (n=2-, 1-, 0, 1+, 2+) with the multiple quinonoid bridging ligand Q=1,2,4,5-tetraimino-3,6-diketocyclohexane

Popis výsledku anglicky

Meso- and rac-configurated diastereoisomers [Ru2(acac)4(?-Q)] have been separated and identified as RuII?Q0 species through a crystal structure analysis of the meso form. Cyclic voltammetric and spectroelectrochemical (UV-vis-NIR, IR, EPR) characterisation of the five accessible states (2-, 1-, 0, 1+ and 2+ forms) was performed. Oxidation occurs at the metal ions to produce RuIIRuIII mixed-valent states with corresponding EPR features but without detectable intervalence absorption in the near infrared region. IR-spectroelectrochemistry reveals opposite frequency shifts for the ?(C=O) and ?(NH) stretching vibrations on reduction and oxidation, in agreement with the assumed electronic structure. Reduction leads to strongly stabilised [Ru2(acac)4(?-Q)]- states which show weak NIR shoulders around 1040 nm. The EPR characteristics are remarkably different for the two isomeric monoanions, reflecting presumably flexible geometry and electronic structure.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Dalton Transactions

ISSN

1477-9226

e-ISSN

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Svazek periodika

-

Číslo periodika v rámci svazku

43

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000271162300034

EID výsledku v databázi Scopus

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