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Subject Item
n2:RIV%2F61388955%3A_____%2F08%3A00321030%21RIV09-AV0-61388955
rdf:type
n5:Vysledek skos:Concept
dcterms:description
Dirutheniové komplexy s chinonoidním můstkem [(acac)2Ru(.mu.-L)Ru(acac)2 (acac- = acetylacetonato = 2,4-pentanedionato; L2 =2,5-dioxido-1,4-benzochinon, 1; 3,6-dichloro-2,5-dioxido-1,4-benzochinon, 2; 5,8-dioxido-1,4-naftochinon, 3; 2,3-dichloro-5,8-dioxido-1,4-naftochiinon, 4; 1,5-dioxido-9,10-antrachinon, 5; a 1,5-diimido-9,10-antrachinon, 6 ) byly připraveny a charakterizovány analyticky. Současná přítomnost vysoce redox-aktivních chinonoidních můstkových ligandů a dvou rutheniových center schopných přijmout oxidační stavy +2, +3, a +4 vytváří velkou rozmanitost možných kombinací oxidačních stavů. V důsledku toho komplexy 1-6 vykazují dva reverzibilní jednoelektronové oxidační kroky a přinejmenším dva reverzibilní redukční procesy. Zatímco první redukční stupně byly přiřazeny procesům lokalizovaným převážně na ligandy, oxidace zahrnuje molekulární orbitaly delokalizované mezi kovy a ligandy, s proměnnou mírou smíšení. The quinonoid ligand-bridged diruthenium compounds [(acac)2Ru(.mu.-L)Ru(acac)2 (acac- = acetylacetonato = 2,4-pentanedionato; L2 =2,5-dioxido-1,4-benzoquinone, 1; 3,6-dichloro-2,5-dioxido-1,4-benzoquinone, 2; 5,8-dioxido-1,4-naphthoquinone, 3; 2,3-dichloro-5,8-dioxido-1,4-naphthoquinone, 4; 1,5-dioxido-9,10-anthraquinone, 5; and 1,5-diimido-9,10-anthraquinone, 6) were prepared and characterized analytically. The simultaneous presence of highly redox-active quinonoid-bridging ligands and of two ruthenium centers capable of adopting the oxidation states +2, +3, and +4 creates a large variety of possible oxidation state combinations. Accordingly, the complexes 1–6 exhibit two reversible one-electron oxidation steps and at least two reversible reduction processes. While the first reduction steps are assigned to largely ligand-centered processes, the oxidation appears to involve metal–ligand delocalized molecular orbitals with variable degree of mixing. The quinonoid ligand-bridged diruthenium compounds [(acac)2Ru(.mu.-L)Ru(acac)2 (acac- = acetylacetonato = 2,4-pentanedionato; L2 =2,5-dioxido-1,4-benzoquinone, 1; 3,6-dichloro-2,5-dioxido-1,4-benzoquinone, 2; 5,8-dioxido-1,4-naphthoquinone, 3; 2,3-dichloro-5,8-dioxido-1,4-naphthoquinone, 4; 1,5-dioxido-9,10-anthraquinone, 5; and 1,5-diimido-9,10-anthraquinone, 6) were prepared and characterized analytically. The simultaneous presence of highly redox-active quinonoid-bridging ligands and of two ruthenium centers capable of adopting the oxidation states +2, +3, and +4 creates a large variety of possible oxidation state combinations. Accordingly, the complexes 1–6 exhibit two reversible one-electron oxidation steps and at least two reversible reduction processes. While the first reduction steps are assigned to largely ligand-centered processes, the oxidation appears to involve metal–ligand delocalized molecular orbitals with variable degree of mixing.
dcterms:title
Valence-State Analysis through Spectroelectrochemistry in a Series of Quinonoid-Bridged Diruthenium Complexes [(acac)(2)Ru(mu-L)Ru(acac)(2)](n) (n =+2,+1, 0,-1,-2) Valence-State Analysis through Spectroelectrochemistry in a Series of Quinonoid-Bridged Diruthenium Complexes [(acac)2Ru(.mu.-L)Ru(acac)2]n (n= +2, +1, 0, -1, -2) Valence-State Analysis through Spectroelectrochemistry in a Series of Quinonoid-Bridged Diruthenium Complexes [(acac)(2)Ru(mu-L)Ru(acac)(2)](n) (n =+2,+1, 0,-1,-2)
skos:prefLabel
Valence-State Analysis through Spectroelectrochemistry in a Series of Quinonoid-Bridged Diruthenium Complexes [(acac)(2)Ru(mu-L)Ru(acac)(2)](n) (n =+2,+1, 0,-1,-2) Valence-State Analysis through Spectroelectrochemistry in a Series of Quinonoid-Bridged Diruthenium Complexes [(acac)2Ru(.mu.-L)Ru(acac)2]n (n= +2, +1, 0, -1, -2) Valence-State Analysis through Spectroelectrochemistry in a Series of Quinonoid-Bridged Diruthenium Complexes [(acac)(2)Ru(mu-L)Ru(acac)(2)](n) (n =+2,+1, 0,-1,-2)
skos:notation
RIV/61388955:_____/08:00321030!RIV09-AV0-61388955
n3:aktivita
n15:P n15:Z
n3:aktivity
P(LC510), P(OC 140), Z(AV0Z40400503)
n3:cisloPeriodika
34
n3:dodaniDat
n4:2009
n3:domaciTvurceVysledku
n10:3742121
n3:druhVysledku
n16:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
402209
n3:idVysledku
RIV/61388955:_____/08:00321030
n3:jazykVysledku
n9:eng
n3:klicovaSlova
magnetic properties; quinones; ruthenium; spectroelectrochemistry
n3:klicoveSlovo
n7:quinones n7:magnetic%20properties n7:spectroelectrochemistry n7:ruthenium
n3:kodStatuVydavatele
DE - Spolková republika Německo
n3:kontrolniKodProRIV
[676DA7D1A3D5]
n3:nazevZdroje
Chemistry - A European Journal
n3:obor
n17:CG
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
9
n3:projekt
n13:LC510 n13:OC%20140
n3:rokUplatneniVysledku
n4:2008
n3:svazekPeriodika
14
n3:tvurceVysledku
Sarkar, B. Fiedler, Jan Puranik, V. G. Ghumaan, S. Urbanos, F. A. Lahiri, G. K. Kaim, W. Maji, S. Jimenez-Aparicio, R.
n3:wos
000261555200036
n3:zamer
n14:AV0Z40400503
s:issn
0947-6539
s:numberOfPages
13