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| Description
| - The air-stable chiral diphosphine chelate ligand R,R-QuinoxP = 2,3-bis(tert-butylmethylphosphino)quinoxaline = L has been used to obtain crystallographically characterized complexes (L)PtCl2 (1), (L)PdCl2 (2), and (L)Re(CO)3Cl (3). Coordination was found to occur via the P donor atoms as indicated by crystal structures and NMR studies; the quinoxaline N donors do not participate in any coordination to the metals. Electron accepting by the quinoxaline heterocycle is not only responsible for improved stability of L towards air but also for rather facile reduction of the complexes to persistent radical anions 1.- and 3.-. In contrast, the reduction to 2.- proceeds irreversibly. EPR, UV-Vis and IR spectroelectrochemistry was used to establish the spin location in the quinoxaline .pi. system with rather small contributions from the metals or the phosphorus nuclei.
- The air-stable chiral diphosphine chelate ligand R,R-QuinoxP = 2,3-bis(tert-butylmethylphosphino)quinoxaline = L has been used to obtain crystallographically characterized complexes (L)PtCl2 (1), (L)PdCl2 (2), and (L)Re(CO)3Cl (3). Coordination was found to occur via the P donor atoms as indicated by crystal structures and NMR studies; the quinoxaline N donors do not participate in any coordination to the metals. Electron accepting by the quinoxaline heterocycle is not only responsible for improved stability of L towards air but also for rather facile reduction of the complexes to persistent radical anions 1.- and 3.-. In contrast, the reduction to 2.- proceeds irreversibly. EPR, UV-Vis and IR spectroelectrochemistry was used to establish the spin location in the quinoxaline .pi. system with rather small contributions from the metals or the phosphorus nuclei. (en)
- Chirální difosfinový chelatový ligand R,R-QuinoxP = 2,3-bis(terc-butylmethylfosfino)chinoxaline = L je stálý na vzduchu a byl použit k získání krystalograficky charakterizovaných komplexů (L)PtCl2 (1), (L)PdCl2 (2), a (L)Re(CO)3Cl (3). Bylo zjištěno, že koordinace nastavá přes P donorové atomy, jak ukazují krystalové struktury a NMR studie; chinoxalinové N donory se neúčastní žádné koordinace ke kovům. Chinoxalinový heterocykl, schopný přijímat elektrony, není jen zodpovědný za zlepšenou stabilitu L k vzduchu ale také za dosti snadnou redukci komplexů na stálé radikálové anionty 1.- a 3.-. Naopak, redukce na 2.- probíhá ireversibilně. EPR, UV-VIS a IR spektroelektrochemie byla použita ke stanovení lokalizace spinu na chinoxalinovém .pi. systému, s jen malými příspěvky od kovů nebo fosforových jader. (cs)
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| Title
| - Structures and Redox Properties of Metal Complexes of the Electron-Deficient Diphosphine Chelate Ligand R,R-QuinoxP
- Structures and Redox Properties of Metal Complexes of the Electron-Deficient Diphosphine Chelate Ligand R,R-QuinoxP (en)
- Struktury a redox vlastnosti kovových komplexů s electronově deficitním difosfinovým chelátovým ligandem R,R-QuinoxP (cs)
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| skos:prefLabel
| - Structures and Redox Properties of Metal Complexes of the Electron-Deficient Diphosphine Chelate Ligand R,R-QuinoxP
- Structures and Redox Properties of Metal Complexes of the Electron-Deficient Diphosphine Chelate Ligand R,R-QuinoxP (en)
- Struktury a redox vlastnosti kovových komplexů s electronově deficitním difosfinovým chelátovým ligandem R,R-QuinoxP (cs)
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| skos:notation
| - RIV/61388955:_____/08:00309647!RIV09-AV0-61388955
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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
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| http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/08:00309647
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - 2,3-bis(tert-butylmethylphosphino)quinoxaline; radical complexes; phosphine ligand (en)
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| http://linked.open.../riv/klicoveSlovo
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| 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
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Fiedler, Jan
- Kaim, W.
- Sarkar, B.
- Bulak, E.
- Das, A. K.
- Lissner, F.
- Niemeyer, M.
- Schleid, T.
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| http://linked.open...ain/vavai/riv/wos
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| http://linked.open...n/vavai/riv/zamer
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