A tetranuclear organorhenium(I) complex of the 2,3,5,6-tetrafluoro-7,7,8,8-tetracyano-p-quinodimethane radical anion, TCNQF4.-

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F08%3A00316294" target="_blank" >RIV/61388955:_____/08:00316294 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

A tetranuclear organorhenium(I) complex of the 2,3,5,6-tetrafluoro-7,7,8,8-tetracyano-p-quinodimethane radical anion, TCNQF4.-

Original language description

The radical complex {(4-TCNQF4)[Re(CO)3(bpy)]4}(PF6)3, as prepared and isolated from the reaction between TCNQF4 and [Re(CO)3(bpy)(MeOH)](PF6), was studied electrochemically and by IR vibrational spectroscopy, UV-Vis-NIR absorption spectroscopy, and by EPR at 9.5, 190 and 285 GHz. The isotropic g factor of 2.0058, the detectable g anisotropy, and the 185,187Re EPR hyperfine coupling of 0.95 mT for four equivalent metal nuclei support predominant, but not exclusive, spin localisation at the bridging ligand. Nitrile and metal carbonyl stretching frequencies as well as the typically structured near infrared absorption band lend further support to (TCNQF4-)(ReI)4 as the most appropriate oxidation state formulation. In comparison to the non-radical complex{(4-TCNQ)[Re(CO)3(bpy)]4}(PF6)4 an X-ray structure analysis of {(4-TCNQF4)[Re(CO)3(bpy)]4}(PF6)3 shows a marginally more twisted (ReNCCCNRe)(C6X4)(ReNCCCNRe) configuration and a different up/down arrangement of the [Re(CO)3(bpy)]+ groups

Czech name

Čtyřjaderný organorheniový(I) komplex 2,3,5,6-tetrafluoro-7,7,8,8-tetracyano-p-quinodimethane radikálového anionu, TCNQF4.-

Czech description

Radikálový komplex {(.mu.4-TCNQF4)[Re(CO)3(bpy)]4}(PF6)3 byl připraven a charakterizován elektrochemicky, IČ vibrační spektroskopií, UV-Vis-NIR absorpční spektroskopií a EPR. Zjištěný isotropický g factor 2.0058 a 185,187Re EPR štěpící konstanta 0.95 mTpro čtyři ekvivalentní Re centra indikují převážnou lokalizaci spinové hustoty na můstkovém ligandu s nezanedbatelným příspěvkem Re. Fyzikální vlastnosti byly interpretovány pomocí kvantově chemických DFT výpočtů.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CG - Electrochemistry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

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

Name of the periodical

Dalton Transactions

ISSN

1477-9226

e-ISSN

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Volume of the periodical

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Issue of the periodical within the volume

42

Country of publishing house

GB - UNITED KINGDOM

Number of pages

5

Pages from-to

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UT code for WoS article

000260227000011

EID of the result in the Scopus database

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