About: 3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L-H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in [{(acac)2Ru}2(.mu.-L-H+)] and [{(bpy)2Ru}2 (.mu.-L-H+)]4+ by spectroelectrochemistry and EPR     Goto   Sponge   NotDistinct   Permalink

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Description
  • Crystallographically characterised 3,6-bis(2'-pyridyl)pyridazine (L) forms complexes with (acac)2Run or (bpy)2Ru2+ first via one pyridyl-N/pyridazyl-N chelate site in mononuclear RuII complexes (acac)2Ru(L), 1, and [(bpy)2Ru(L)](ClO4)2, 3(ClO4)2. Coordination of a second metal complex fragment is accompanied by deprotonation at the pyridazyl-C4 carbon to yield cyclometallated, asymmetrically bridged dinuclear complexes [(acac)2RuIII(.mu.-L-H.+)RuIII(acac)2](ClO4), 2(ClO4), and [(bpy)2RuII(.mu.-L-H+)RuII(bpy)2](ClO4)3, 4(ClO4)3. The very different co-ligand characteristics of mainly .sigma. donating acac- and .pi. accepting bpy are responsible for very different redox potentials and thus for the isolation of the diruthenium(III) form 2(ClO4) with antiferromagnetically coupled RuIII centers (J = -11.5 cm-1) and of the luminescent diruthenium(II) species 4(ClO4)3.
  • Crystallographically characterised 3,6-bis(2'-pyridyl)pyridazine (L) forms complexes with (acac)2Run or (bpy)2Ru2+ first via one pyridyl-N/pyridazyl-N chelate site in mononuclear RuII complexes (acac)2Ru(L), 1, and [(bpy)2Ru(L)](ClO4)2, 3(ClO4)2. Coordination of a second metal complex fragment is accompanied by deprotonation at the pyridazyl-C4 carbon to yield cyclometallated, asymmetrically bridged dinuclear complexes [(acac)2RuIII(.mu.-L-H.+)RuIII(acac)2](ClO4), 2(ClO4), and [(bpy)2RuII(.mu.-L-H+)RuII(bpy)2](ClO4)3, 4(ClO4)3. The very different co-ligand characteristics of mainly .sigma. donating acac- and .pi. accepting bpy are responsible for very different redox potentials and thus for the isolation of the diruthenium(III) form 2(ClO4) with antiferromagnetically coupled RuIII centers (J = -11.5 cm-1) and of the luminescent diruthenium(II) species 4(ClO4)3. (en)
  • Krystalograficky charakterizovaný 3,6-bis(2'-pyridyl)pyridazine (L ) tvoří komplexy s (acac)2Run nebo (bpy)2Ru2+ nejprve prostřednictvím jednoho pyridyl-N/pyridazyl-N chelátu v jednojaderných RuII komplexech (acac)2Ru(L), 1, a [(bpy)2Ru(L)](ClO4)2, 3(ClO4)2. Koordinace druhého fragmentu komplexu kovu je doprovázena deprotonizací na pyridazyl-C4 uhlíku za vzniku cyklometalických asymetricky přemostěných dvojjaderných komplexů [(acac)2RuIII(.mu.-L-H+) RuIII(acac)2](ClO4), 2(ClO4), a [(bpy)2RuII(.mu.-L-H+)RuII(bpy)2] (ClO4)3, 4(ClO4)3. Velmi odlišné charakteristiky koligandů, .sigma. donorového acac- a .pi. akceptorového bpy, jsou zodpovědné za velmi odlišné redox potentiály a následně za izolaci diruthenium(III) formy 2(ClO4) s antiferomagneticky spojenými RuIII centry (J = -11.5 cm-1) a luminiscenční diruthenium(II) částice 4(ClO4)3. (cs)
Title
  • 3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L-H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in [{(acac)2Ru}2(.mu.-L-H+)] and [{(bpy)2Ru}2 (.mu.-L-H+)]4+ by spectroelectrochemistry and EPR
  • 3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L-H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in [{(acac)2Ru}2(.mu.-L-H+)] and [{(bpy)2Ru}2 (.mu.-L-H+)]4+ by spectroelectrochemistry and EPR (en)
  • 3,6-Bis(2'-pyridyl)pyridazine (L) a jeho deprotonovaná forma (L-H+)- jako ligandy pro (acac)2Run+ nebo (bpy)2Rum+: Studium smíšené valence v [{(acac)2Ru}2(.mu.-L-H+)] a [{(bpy)2Ru}2 (.mu.-L-H+)]4+ s použitím spectroelectrochemiey a EPR (cs)
skos:prefLabel
  • 3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L-H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in [{(acac)2Ru}2(.mu.-L-H+)] and [{(bpy)2Ru}2 (.mu.-L-H+)]4+ by spectroelectrochemistry and EPR
  • 3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L-H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in [{(acac)2Ru}2(.mu.-L-H+)] and [{(bpy)2Ru}2 (.mu.-L-H+)]4+ by spectroelectrochemistry and EPR (en)
  • 3,6-Bis(2'-pyridyl)pyridazine (L) a jeho deprotonovaná forma (L-H+)- jako ligandy pro (acac)2Run+ nebo (bpy)2Rum+: Studium smíšené valence v [{(acac)2Ru}2(.mu.-L-H+)] a [{(bpy)2Ru}2 (.mu.-L-H+)]4+ s použitím spectroelectrochemiey a EPR (cs)
skos:notation
  • RIV/61388955:_____/05:00022052!RIV06-AV0-61388955
http://linked.open.../vavai/riv/strany
  • 706;712
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1P05OC068), P(IAA400400505), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika
  • 4
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
  • 552752
http://linked.open...ai/riv/idVysledku
  • RIV/61388955:_____/05:00022052
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Creutz-Taube ions; electrochemical properties; electrochemistry (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [294BD5204F11]
http://linked.open...i/riv/nazevZdroje
  • Dalton Transactions: an international journal of inorganic chemistry
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
  • -
http://linked.open...iv/tvurceVysledku
  • Fiedler, Jan
  • Kaim, W.
  • Lahiri, G. K.
  • Sarkar, B.
  • van Slageren, J.
  • Patra, S.
  • Ghumaan, S.
  • Parimal, K.
http://linked.open...n/vavai/riv/zamer
issn
  • 1477-9226
number of pages
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