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| Description
| - The tppz bridged diruthenium(II) complex [(dpk)(Cl)RuII(.mu.tppz)RuII(Cl)(dpk)](ClO4)2, [2](ClO4)2 and the monomeric derivative [(dpk)(Cl)RuII(tppz)](ClO4), [1](ClO4) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine, dpk = 2 , 2/dipyridylketone] have been synthesized. It is shown how electrochemical data ( Eox, Ered, Kc) reflect the donor/acceptor effects of ancillary ligands L in a series of systems [(L)ClRu(tppz)RuCl(L)]n, particularly the competition between L and tppz for electron density from the metal. According to EPR the intermediate [2]3+ is a mixed-valent RuIIRuIII species which shows a rather narrow intervalence charge transfer (IVCT) band at 1800 nm.The apparent contradiction between the moderate value of Kc and the narrow IVCT band is being discussed considering %22borderline%22 or %22hybrid%22 %22Class II-III%22 concepts of mixed-valency, as well as coordination aspects, i.e., the bis-tridentate nature of the .pi.-acceptor bridging ligand.
- The tppz bridged diruthenium(II) complex [(dpk)(Cl)RuII(.mu.tppz)RuII(Cl)(dpk)](ClO4)2, [2](ClO4)2 and the monomeric derivative [(dpk)(Cl)RuII(tppz)](ClO4), [1](ClO4) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine, dpk = 2 , 2/dipyridylketone] have been synthesized. It is shown how electrochemical data ( Eox, Ered, Kc) reflect the donor/acceptor effects of ancillary ligands L in a series of systems [(L)ClRu(tppz)RuCl(L)]n, particularly the competition between L and tppz for electron density from the metal. According to EPR the intermediate [2]3+ is a mixed-valent RuIIRuIII species which shows a rather narrow intervalence charge transfer (IVCT) band at 1800 nm.The apparent contradiction between the moderate value of Kc and the narrow IVCT band is being discussed considering %22borderline%22 or %22hybrid%22 %22Class II-III%22 concepts of mixed-valency, as well as coordination aspects, i.e., the bis-tridentate nature of the .pi.-acceptor bridging ligand. (en)
- Syntetizován byl diruthenatý komplex [(dpk)(Cl)RuII(.mu.-tppz)RuII(Cl)(dpk)](ClO4)2, [2](ClO4)2 s můstkovým tppz a monomerický derivát [(dpk)(Cl)RuII(tppz)](ClO4), [1](ClO4) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazin, dpk = 2, 2/-dipyridylketon]. Je ukázáno, jak electrochemická data ( Eox, Ered, Kc ) odráží donor/akceptorové efekty doplňkových ligandů L v sérii systémů [(L)ClRu(tppz)RuCl(L )]n, zvláště soutěžení mezi L a tppz o elektronovou hustotu od kovu. Meziprodukt [2]3+ je dle EPR typem RuIIRuIII se smíšenou valencí, který vykazuje dosti úzký se intervalenční pás přenosu náboje (IVCT ) u 1800 nm. Zjevný rozpor mezi nepříliš velkou hodnotou Kc a úzkým IVCT pásem je diskutován s uvážením %22hraničního%22 nebo %22hybridního%22 konceptu smíšené valence %22třídy II-III%22. Diskutovány jsou rovněž koordinační aspekty, t.j. bis-tridentátní povaha .pi.–acceptorového můstkového ligandu. (cs)
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| Title
| - 2,2/-Dipyridylketone (dpk) as Ancillary Acceptor and Reporter Ligand in Complexes [(dpk)(Cl)Ru(.mu.-tppz)Ru(Cl)(dpk)]n+ where tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazine
- 2,2/-Dipyridylketone (dpk) as Ancillary Acceptor and Reporter Ligand in Complexes [(dpk)(Cl)Ru(.mu.-tppz)Ru(Cl)(dpk)]n+ where tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazine (en)
- 2,2/-dipyridylketon (dpk) jako doplňkový ligand s akceptorovou a indikační funkcí v komplexech [(dpk)(Cl)Ru(.mu.-tppz)Ru(Cl)(dpk)]n+ , kde tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazin (cs)
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| skos:prefLabel
| - 2,2/-Dipyridylketone (dpk) as Ancillary Acceptor and Reporter Ligand in Complexes [(dpk)(Cl)Ru(.mu.-tppz)Ru(Cl)(dpk)]n+ where tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazine
- 2,2/-Dipyridylketone (dpk) as Ancillary Acceptor and Reporter Ligand in Complexes [(dpk)(Cl)Ru(.mu.-tppz)Ru(Cl)(dpk)]n+ where tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazine (en)
- 2,2/-dipyridylketon (dpk) jako doplňkový ligand s akceptorovou a indikační funkcí v komplexech [(dpk)(Cl)Ru(.mu.-tppz)Ru(Cl)(dpk)]n+ , kde tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazin (cs)
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| skos:notation
| - RIV/61388955:_____/06:00049119!RIV07-AV0-61388955
|
| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(OC 139), P(OC 140), Z(AV0Z40400503)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/06:00049119
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - dinuclear Ru complexes; Creutz-Taube ion; mixed-valence system (en)
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| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| |
| 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
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| http://linked.open...iv/tvurceVysledku
| - Fiedler, Jan
- Kaim, W.
- Lahiri, G. K.
- Sarkar, B.
- Sieger, M.
- Ghumaan, S.
- Chanda, N.
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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