Evidence for the dimer-of-(mixed-valent dimers) configuration in tetranuclear {(mu(4)-TCNX)[Ru(NH3)(5)](4)}(8+), TCNX = TCNE and TCNQ, from DFT calculations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F09%3A00335779" target="_blank" >RIV/61388955:_____/09:00335779 - 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

Evidence for the dimer-of-(mixed-valent dimers) configuration in tetranuclear {(mu(4)-TCNX)[Ru(NH3)(5)](4)}(8+), TCNX = TCNE and TCNQ, from DFT calculations

Popis výsledku v původním jazyce

DFT calculations of the complex ions {(mu(4)-TCNX)[Ru(NH3)(5)](4)}(8+), TCNX = tetracyanoethene (TCNE) and 7,7,8,8-tetracyano-p-quinodimethane (TCNQ), yield triplet state energy minimum structures with nonplanar bridging ligands. The calculated C-C bonddistances and twist angles confirm considerable metal-to-ligand electron transfer from the metal centers to the TCNE and TCNQ bridges in the lowest triplet and singlet states. The resulting situation, involving a weak interaction between two strongly coupled malonodinitrilato-bridged (RuRu2.5)-Ru-2.5 entities (Class III), agrees with experimental results; the near-orthogonality found for the ground states of the molecular ions explains the observed magnetic exchange coupling between two S = 1/2 sites, the 1,258 cm(-1) absorption in the IR spectrum of the TCNE complex, and the reversible two-electron oxidation. The nitrile stretching frequency shifts were reasonably reproduced by the calculations.

Název v anglickém jazyce

Evidence for the dimer-of-(mixed-valent dimers) configuration in tetranuclear {(mu(4)-TCNX)[Ru(NH3)(5)](4)}(8+), TCNX = TCNE and TCNQ, from DFT calculations

Popis výsledku anglicky

DFT calculations of the complex ions {(mu(4)-TCNX)[Ru(NH3)(5)](4)}(8+), TCNX = tetracyanoethene (TCNE) and 7,7,8,8-tetracyano-p-quinodimethane (TCNQ), yield triplet state energy minimum structures with nonplanar bridging ligands. The calculated C-C bonddistances and twist angles confirm considerable metal-to-ligand electron transfer from the metal centers to the TCNE and TCNQ bridges in the lowest triplet and singlet states. The resulting situation, involving a weak interaction between two strongly coupled malonodinitrilato-bridged (RuRu2.5)-Ru-2.5 entities (Class III), agrees with experimental results; the near-orthogonality found for the ground states of the molecular ions explains the observed magnetic exchange coupling between two S = 1/2 sites, the 1,258 cm(-1) absorption in the IR spectrum of the TCNE complex, and the reversible two-electron oxidation. The nitrile stretching frequency shifts were reasonably reproduced by the calculations.

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

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

Monatshefte fur Chemie

ISSN

0026-9247

e-ISSN

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Svazek periodika

140

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000266926500005

EID výsledku v databázi Scopus

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