About: Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy.

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About: Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy. Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The temperature-dependent intramolecular metal/ligand electron transfer equilibrium (L)Cu-II(Q(2-))reversible arrow(L)Cu-I(Q(.-)) has been quantitatively analyzed by EPR as a function of the non-innocent o-quinonoid ligand Q and of the co-ligand L. Suitable co-ligands were 1-methyl-(2-methylthiomethyl)-1H-benzimidazole and 1-diphenylphosphino-2-dimethylaminoethane (dde) which can tolerate both copper oxidation states. EPR hyperfine data were extracted for a variety of alkyl- and methoxy-substituted o-semiquinones and their copper(l) complexes in solution. A close match of Q and Cu redox orbitals is essential for observing the redox isomer equilibrium which has been similarly reported for aminoxidase enzymes. Efforts to isolate the mixed-ligand compounds from solution failed due to coordination disproportionation. The new [Cu(dde)(2)](ClO4) was structurally characterized with comparable Cu-N and Cu-P distances of 2.24-2.27 Angstrom and a P-Cu-P angle of 142.41(5)degrees. The temperature-dependent intramolecular metal/ligand electron transfer equilibrium (L)Cu-II(Q(2-))reversible arrow(L)Cu-I(Q(.-)) has been quantitatively analyzed by EPR as a function of the non-innocent o-quinonoid ligand Q and of the co-ligand L. Suitable co-ligands were 1-methyl-(2-methylthiomethyl)-1H-benzimidazole and 1-diphenylphosphino-2-dimethylaminoethane (dde) which can tolerate both copper oxidation states. EPR hyperfine data were extracted for a variety of alkyl- and methoxy-substituted o-semiquinones and their copper(l) complexes in solution. A close match of Q and Cu redox orbitals is essential for observing the redox isomer equilibrium which has been similarly reported for aminoxidase enzymes. Efforts to isolate the mixed-ligand compounds from solution failed due to coordination disproportionation. The new [Cu(dde)(2)](ClO4) was structurally characterized with comparable Cu-N and Cu-P distances of 2.24-2.27 Angstrom and a P-Cu-P angle of 142.41(5)degrees. (en)
Title	Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy. Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy. (en)
skos:prefLabel	Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy. Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy. (en)
skos:notation	RIV/61388955:_____/02:54020181!RIV/2003/AV0/A54003/N
http://linked.open.../vavai/riv/strany	163;172
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(OC D14.20), Z(AV0Z4040901)
http://linked.open...iv/cisloPeriodika	N/A
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Záliš, Stanislav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	641774
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/02:54020181
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	copper compounds; EPR spectroscopy; quinone ligands (en)
http://linked.open.../riv/klicoveSlovo	copper compounds EPR spectroscopy quinone ligands
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[FA1824267A2C]
http://linked.open...i/riv/nazevZdroje	Inorganica Chimica Acta
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20D14.20
http://linked.open...UplatneniVysledku	2002
http://linked.open...v/svazekPeriodika	337
http://linked.open...iv/tvurceVysledku	Kaim, W. Záliš, Stanislav Wanner, M. Knödler, A.
http://linked.open...n/vavai/riv/zamer	Objasňování zákonitostí vztahů struktury a vlastností - zejména dynamiky a chemické reaktivity - látek a molekulárních systémů
issn	0020-1693
number of pages	10 (xsd:int)

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