About: Mixed-Valent Metals Bridged by a Radical Ligand: Fact, or Fiction Based on Structure-Oxidation State Correlations     Goto   Sponge   NotDistinct   Permalink

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  • Electron-rich Ru(acac)2 (acac- = 2,4-pentanedionato) binds to the .pi. electron deficient bis-chelate ligands L, L = 2,2´-azobisbipyridine (abpy) or azobis(5-chloropyrimidine) (abcp), with considerable transfer of negative charge. The compounds studied, (abpy)Ru(acac)2 (1), meso-(.mu.-abpy)[Ru(acac)2]2 (2), rac-(.mu.-abpy)[Ru(acac)2]2 (3), and (.mu.-abcp)[Ru(acac)2]2 (4) were calculated by DFT to assess the degree of this metal-to-ligand electron shift. The calculated and experimental structures of 2 and 3 suggest a monoanion character of the bridging ligand. Dinuclear compounds Ru2.5(L.-)Ru2.5 reveal unusual features via EPR and UV-Vis-NIR spectroelectrochemistry. In spite of intense near infrared absorptions, the EPR results show that the first reduction leads to RuII(L.-)RuII species. One-electron oxidation of the Ru2.5(L.-)Ru2.5 species produces RuIII(L.-)RuIII .
  • Electron-rich Ru(acac)2 (acac- = 2,4-pentanedionato) binds to the .pi. electron deficient bis-chelate ligands L, L = 2,2´-azobisbipyridine (abpy) or azobis(5-chloropyrimidine) (abcp), with considerable transfer of negative charge. The compounds studied, (abpy)Ru(acac)2 (1), meso-(.mu.-abpy)[Ru(acac)2]2 (2), rac-(.mu.-abpy)[Ru(acac)2]2 (3), and (.mu.-abcp)[Ru(acac)2]2 (4) were calculated by DFT to assess the degree of this metal-to-ligand electron shift. The calculated and experimental structures of 2 and 3 suggest a monoanion character of the bridging ligand. Dinuclear compounds Ru2.5(L.-)Ru2.5 reveal unusual features via EPR and UV-Vis-NIR spectroelectrochemistry. In spite of intense near infrared absorptions, the EPR results show that the first reduction leads to RuII(L.-)RuII species. One-electron oxidation of the Ru2.5(L.-)Ru2.5 species produces RuIII(L.-)RuIII . (en)
  • Elektronově bohatý Ru(acac)2 (acac- = 2,4-pentanedionato) se váže k .pi. elektronově deficitním bis-chelátovým ligandům L, L = 2,2´-azobisbipyridin (abpy) nebo azobis(5-chloropyrimidin) (abcp), se značným přenosem záporného náboje. Studované sloučeniny, (abpy)Ru(acac)2 (1), meso-(.mu.-abpy)[Ru(acac)2]2 (2), rac-(.mu.-abpy)[Ru(acac)2]2 (3), a (.mu.-abcp)[Ru(acac)2]2 (4) byly počítány s použitím DFT, za účelem vyhodnocení míry elektronového přesunu od kovu k ligandu. Vypočítané a experimentální struktury 2 a 3 ukazují na monoanionický charakter můstkového ligandu. Neobvyklé vlastnosti dvojjaderných sloučenin Ru2.5(L.-) Ru2.5 byly odhaleny prostřednictvím EPR a UV-VIS-NIR spektroelektrochemie. Přes intenzivní absorbční pásy v infračervené oblasti, EPR výsledky ukázaly, že první redukce vede k RuII(L.-)RuII stavům. Jednoelektronová oxidace Ru2.5(L.-) Ru2.5 poskytuje RuIII(L.-) RuIII . (cs)
Title
  • Mixed-Valent Metals Bridged by a Radical Ligand: Fact, or Fiction Based on Structure-Oxidation State Correlations
  • Mixed-Valent Metals Bridged by a Radical Ligand: Fact, or Fiction Based on Structure-Oxidation State Correlations (en)
  • Kovy se smíšenou valencí přemostěné radikálovým ligandem: Fakt nebo fikce založená na korelacích struktury a oxidačních stavů (cs)
skos:prefLabel
  • Mixed-Valent Metals Bridged by a Radical Ligand: Fact, or Fiction Based on Structure-Oxidation State Correlations
  • Mixed-Valent Metals Bridged by a Radical Ligand: Fact, or Fiction Based on Structure-Oxidation State Correlations (en)
  • Kovy se smíšenou valencí přemostěné radikálovým ligandem: Fakt nebo fikce založená na korelacích struktury a oxidačních stavů (cs)
skos:notation
  • RIV/61388955:_____/08:00309642!RIV09-AV0-61388955
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1P05OC068), P(OC 140), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika
  • 11
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 379656
http://linked.open...ai/riv/idVysledku
  • RIV/61388955:_____/08:00309642
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • electron transfer series; quinone-related ligands; ruthenium complexes (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [25D4EC08FD2D]
http://linked.open...i/riv/nazevZdroje
  • Journal of the American Chemical Society
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 130
http://linked.open...iv/tvurceVysledku
  • Fiedler, Jan
  • Kaim, W.
  • Lahiri, G. K.
  • Sarkar, B.
  • Janardanan, D.
  • Patra, S.
  • Sunoj, R. B.
http://linked.open...ain/vavai/riv/wos
  • 253951900066
http://linked.open...n/vavai/riv/zamer
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  • 0002-7863
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